ciprofloxacin (Rx)

Acute Sinusitis

Mild/moderate: 500 mg PO q12hr or 400 mg IV q12hr for 10 days

Limitations-of-use: Reserve fluoroquinolones for patients who do not have other available treatment options for acute sinusitis

Bone & Joint Infections

Mild/moderate: 500 mg PO q12hr or 400 mg IV q12hr for ≥4-6 weeks

Severe/complicated: 750 mg PO q12hr or 400 mg IV q8hr for ≥4-6 weeks

Chronic Bacterial Prostatitis

Indicated for chronic bacterial prostatitis caused by Escherichia coli or Proteus mirabilis

Mild/moderate: 500 mg PO q12hr or 400 mg IV q12hr for 28 days

Infectious Diarrhea

Mild/moderate/severe: 500 mg PO q12hr for 5-7 days

Empirical Therapy in Febrile Neutropenic Patients

Severe: 400 mg IV q8hr for 7-14 days

Intra-abdominal Infections

Complicated: 500 mg PO q12hr or 400 mg IV q12hr for 7-14 days

Lower Respiratory Tract Infections

Mild/moderate: 500 mg PO q12hr or 400 mg IV q12hr for 7-14 days

Severe/complicated: 750 mg PO q12hr or 400 mg IV q8hr for 7-14 days

Limitations-of-use: Reserve fluoroquinolones for patients who do not have other available treatment options for acute bacterial exacerbation of chronic bronchitis

Nosocomial Pneumonia

Mild/moderate/severe: 400 mg IV q8hr for 10-14 days

Skin/Skin Structure Infections

Mild/moderate: 500 mg PO q12hr or 400 mg IV q12hr for 7-14 days

Severe/complicated: 750 mg PO q12hr or 400 mg IV q8hr for 7-14 days

Urinary Tract Infections

Acute uncomplicated: Immediate-release, 250 mg PO q12hr for 3 days; extended-release, 500 mg PO q24hr for 3 days

Mild/moderate: 250 mg PO q12hr or 200 mg IV q12hr for 7-14 days

Severe/complicated: 500 mg PO q12hr or 400 mg IV q12hr for 7-14 days

Limitations-of-use: Reserve fluoroquinolones for patients who do not have other available treatment options for uncomplicated urinary tract infections

Urethral & Cervical Gonococcal Infections

Uncomplicated: 250-500 mg PO once

Anthrax Infection

Postexposure therapy

Inhalation (prophylaxis/postexposure): 500 mg PO q12hr or 400 mg IV q12hr for 60 days

Cutaneous: 500 mg PO q12hr or 400 mg IV q12hr for 60 days

Plague

Indication for treatment and prophylaxis of plague due to Yersinia pestis

500-750 mg PO q12hr x14 days, OR

400 mg IV q8-12hr x 14 days

Bronchiectasis (Orphan)

Orphan indication sponsor

• Aradigm Corporation, 3929 Point Eden Way, Hayward, CA 94545

Noncystic Fibrosis Bronchiectasis (Orphan)

Dry powder for inhalation: Orphan designation for patients with NCFB who suffer from frequent severe acute pulmonary bacterial exacerbations which lead to further inflammation, airway, and lung parenchyma damage

Sponsor

• Bayer HealthCare

Dosage Modifications

Renal impairment

• CrCl >50 mL/min

  • Dose adjustment not necessary

• CrCl 30-50 mL/min

  • Immediate-release: 250-500 mg PO q12hr
  • Extended-release: 1 g PO q24hr
  • Intravenous: 400 mg IV q8-12hr

• CrCl 5-29 mL/min

  • Immediate-release: 250-500 mg PO q18hr
  • Extended-release: 500 mg PO q24hr
  • Intravenous: 200-400 mg IV q12-24hr

• Hemodialysis or peritoneal dialysis

  • Administer after dialysis
  • Immediate-release: 250-500 mg PO q24hr
  • Extended-release: 500 mg PO q24hr
  • Intravenous: 200-400 mg IV q24hr

Dosing Considerations

ProQuin XR should be taken with a meal, preferably evening meal

Cipro XR may be taken with or without meal; drink fluids liberally

Susceptible organisms

• Aeromonas hydrophila, Bacillus anthracis, Bacteroides fragilis, Campylobacter jejuni, Citrobacter freundii, Citrobacter diversus, Enterobacter cloacae, Enterococcus faecalis, Escherichia coli, Haemophilus ducreyi, Haemophilus influenzae, Haemophilus parainfluenzae, Klebsiella pneumoniae, Legionella pneumophila, Morganella morganii, Moraxella catarrhalis, certain mycobacteria, Neisseria gonorrhoeae, Proteus mirabilis, Providencia spp, Pseudomonas aeruginosa, Salmonella typhi, Serratia spp, Shigella spp, methicillin-sensitive Staphylococcus aureus (MSSA), Staphylococcus epidermis, Staphylococcus saprophyticus, Streptococcus pneumoniae, Vibrio cholerae, Yersinia enterocolitica
• First-line therapy: B anthracis, C freundii, C jejuni, Enterobacter spp, Hafnia alvei, S typhi, Salmonella spp, Shigella spp; no unanimity on others (eg, K pneumoniae, M morganii, V cholerae, Y enterocolitica )

Complicated Urinary Tract Infections or Pyelonephritis

<1 year: Safety and efficacy not established

≥1 year (IV): 6-10 mg/kg q8hr; individual dose not to exceed 400 mg for 10-21 days  

≥1 year (PO): 10-20 mg/kg q12hr; individual dose not to exceed 750 mg q12hr for 10-21 days

Cholera

Single dose: 30 mg/kg PO  

Multiple doses: 30 mg/kg/day PO divided q12hr for 3 days

Plague

Indication for treatment and prophylaxis of plague due to Yersinia pestis in pediatric patients from birth to 17 years of age

15 mg/kg PO q8-12hr x10-21 days; not to exceed 500 mg/dose, OR  

10 mg/kg IV q8-12hr x 10-21 days; not to exceed 400 mg/dose

Inhalational Anthrax (Off-label)

Postexposure therapy

IV: 10 mg/kg q12hr for 60 days; individual dose not to exceed 400 mg  

PO: 15 mg/kg q12hr for 60 days; individual dose not to exceed 500 mg

Change antibiotic to amoxicillin as soon as penicillin susceptibility confirmed

Cystic Fibrosis (Off-label)

PO: 40 mg/kg/day divided q12hr; not to exceed 2 g/day  

IV: 20-30 mg/kg/day divided q8-12hr; not to exceed 1.2 g/day

Contraindicated (2)

• fezolinetant

  ciprofloxacin will increase the level or effect of fezolinetant by affecting hepatic enzyme CYP1A2 metabolism. Contraindicated. Fezolinetant AUC and peak plasma concentration are increased if coadministered with drugs that are weak, moderate, or strong CYP1A2 inhibitors

• flibanserin

  ciprofloxacin will increase the level or effect of flibanserin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration of flibanserin with moderate or strong CYP3A4 inhibitors is contraindicated. Severe hypotension or syncope can occur.

Serious - Use Alternative (74)

• alosetron

  ciprofloxacin will increase the level or effect of alosetron by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Alosetron is associated with potentially serious and life-threatening, dose-related gastrointestinal adverse effects, concomitant use with CYP450 1A2 inhibitors should generally be avoided if possible.

• aluminum hydroxide

  aluminum hydroxide decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Separate by 2 hours.

• aminolevulinic acid oral

  aminolevulinic acid oral, ciprofloxacin. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Avoid administering other phototoxic drugs with aminolevulinic acid oral for 24 hr during perioperative period.

• aminolevulinic acid topical

  ciprofloxacin increases toxicity of aminolevulinic acid topical by pharmacodynamic synergism. Avoid or Use Alternate Drug. Coadministration of photosensitizing drugs may enhance the phototoxic reaction to photodynamic therapy with aminolevulinic acid.

• amisulpride

  amisulpride and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. ECG monitoring is recommended if coadministered.

• anagrelide

  anagrelide and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• BCG vaccine live

  ciprofloxacin decreases effects of BCG vaccine live by pharmacodynamic antagonism. Contraindicated. Antibiotics may diminish therapeutic effects of BCG. Wait until Abx Tx complete to administer live bacterial vaccine.

• buprenorphine

  buprenorphine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine buccal

  buprenorphine buccal and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine subdermal implant

  buprenorphine subdermal implant and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine transdermal

  buprenorphine transdermal and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine, long-acting injection

  buprenorphine, long-acting injection and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• carbonyl iron

  carbonyl iron decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

• ceritinib

  ceritinib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• cholera vaccine

  ciprofloxacin, cholera vaccine. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Avoid coadministration of cholera vaccine with systemic antibiotics since these agents may be active against the vaccine strain. Do not administer cholera vaccine to patients who have received oral or parenteral antibiotics within 14 days prior to vaccination.

• clarithromycin

  clarithromycin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• clomipramine

  ciprofloxacin will increase the level or effect of clomipramine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Concurrent use of drugs that can cause QT interval prolongation may result in additive effects and increased risk of ventricular arrhythmias. It is important to monitor therapy carefully.

• clozapine

  ciprofloxacin will increase the level or effect of clozapine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Use caution when administering ciprofloxacin in patients receiving drugs that prolong the QT interval. At elevated serum concentrations, clozapine may produce clinically significant prolongation of the QTc interval.
  
  clozapine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• cobimetinib

  ciprofloxacin will increase the level or effect of cobimetinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concurrent short term (14 days or less) use of moderate CYP3A inhibitors is unavoidable for patients who are taking cobimetinib 60 mg, reduce the cobimetinib dose to 20 mg. After discontinuation of a moderate CYP3A inhibitor, resume cobimetinib 60 mg. Use an alternative to a moderate CYP3A inhibitor in patients who are taking a reduced dose of cobimetinib (40 or 20 mg daily).

• desflurane

  desflurane and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• didanosine

  didanosine decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Oral ciprofloxacin should not be administered simultaneously with didanosine (chewable tablets or powder for oral solution). Administer oral doses of ciprofloxacin 2 hours before or 6 hours after didanosine, chewable tablets or powder for oral solution.

• dofetilide

  dofetilide increases toxicity of ciprofloxacin by QTc interval. Avoid or Use Alternate Drug.

• dronedarone

  ciprofloxacin and dronedarone both increase QTc interval. Avoid or Use Alternate Drug. The use of dronedarone in combination with other medications that can prolong the QT interval is contraindicated.

• eliglustat

  eliglustat and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• encorafenib

  encorafenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• entrectinib

  ciprofloxacin and entrectinib both increase QTc interval. Avoid or Use Alternate Drug.

• eribulin

  eribulin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• fexinidazole

  fexinidazole and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of fexinidazole with drugs known to block potassium channels and/or prolong QT interval.

• givinostat

  ciprofloxacin and givinostat both increase QTc interval. Avoid or Use Alternate Drug. If unable to avoid coadministration, obtain ECGs when initiating, during concomitant use, and as clinically indicated. Withhold if QTc interval >500 ms or a change from baseline >60 ms.

• glasdegib

  ciprofloxacin and glasdegib both increase QTc interval. Avoid or Use Alternate Drug. If coadministration unavoidable, monitor for increased risk of QTc interval prolongation.

• hydroxychloroquine sulfate

  hydroxychloroquine sulfate and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• ibrutinib

  ciprofloxacin increases levels of ibrutinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid concomitant use of ibrutinib and strong CYP3A4 inhibitors. If a strong CYP3A4 inhibitor must be used short-term (eg, anti-infectives for =7 days), interrupt ibrutinib therapy until strong CYP3A4 inhibitor is discontinued.

• imipramine

  ciprofloxacin will increase the level or effect of imipramine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Concurrent use of drugs that can cause QT interval prolongation may result in additive effects and increased risk of ventricular arrhythmias. It is important to monitor therapy carefully.

• inotuzumab

  inotuzumab and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. If unable to avoid concomitant use, obtain ECGs and electrolytes before and after initiation of any drug known to prolong QTc, and periodically monitor as clinically indicated during treatment.

• iron sucrose

  iron sucrose decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• isoflurane

  isoflurane and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• ivosidenib

  ivosidenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of QTc prolonging drugs with ivosidenib or replace with alternate therapies. If coadministration of a QTc prolonging drug is unavoidable, monitor for increased risk of QTc interval prolongation.

• lasmiditan

  lasmiditan increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

• lefamulin

  lefamulin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• lonafarnib

  ciprofloxacin will increase the level or effect of lonafarnib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration of lonafarnib (a sensitive CYP3A substrate) with weak CYP3A inhibitors is unavoidable, reduce to, or continue lonafarnib at starting dose. Closely monitor for arrhythmias and events (eg, syncope, heart palpitations) since lonafarnib effect on QT interval is unknown.

• macimorelin

  macimorelin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Macimorelin causes an increase of ~11 msec in the corrected QT interval. Avoid coadministration with drugs that prolong QT interval, which could increase risk for developing torsade de pointes-type ventricular tachycardia. Allow sufficient washout time of drugs that are known to prolong the QT interval before administering macimorelin.

• mefloquine

  mefloquine increases toxicity of ciprofloxacin by QTc interval. Avoid or Use Alternate Drug. Mefloquine may enhance the QTc prolonging effect of high risk QTc prolonging agents.

• methyl aminolevulinate

  ciprofloxacin, methyl aminolevulinate. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Each drug may increase the photosensitizing effect of the other.

• microbiota oral

  ciprofloxacin decreases effects of microbiota oral by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Microbiota oral contains bacterial spores. Antibacterial agents may decrease efficacy if coadministered. Complete antibiotic regimens 2-4 days before initiating microbiota oral. .

• mirtazapine

  mirtazapine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• mobocertinib

  mobocertinib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. If coadministration unavoidable, reduce mobocertinib dose and monitor QTc interval more frequently.

• olanzapine

  olanzapine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• olaparib

  ciprofloxacin will increase the level or effect of olaparib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration with moderate CYP3A inhibitors cannot be avoided, reduce olaparib dose to 200 mg (capsule) or 150 mg (tablet) PO BID. Do not substitute tablets with capsules.

• ondansetron

  ciprofloxacin and ondansetron both increase QTc interval. Avoid or Use Alternate Drug. Avoid with congenital long QT syndrome; ECG monitoring recommended with concomitant medications that prolong QT interval, electrolyte abnormalities, CHF, or bradyarrhythmias.

• oxaliplatin

  oxaliplatin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• panobinostat

  ciprofloxacin and panobinostat both increase QTc interval. Avoid or Use Alternate Drug. Panobinostat is known to significantly prolong QT interval. Panobinostat prescribing information states use with drugs known to prolong QTc is not recommended.

• pirfenidone

  ciprofloxacin will increase the level or effect of pirfenidone by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Use of strong CYP1A2 inhibitors should be discontinued before initiating pirfenidone and avoided during treatment; if strong CYP1A2 inhibitors are the only drug of choice, dosage reductions are recommended

• pitolisant

  ciprofloxacin and pitolisant both increase QTc interval. Avoid or Use Alternate Drug.

• pomalidomide

  ciprofloxacin increases levels of pomalidomide by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug.

• rasagiline

  ciprofloxacin will increase the level or effect of rasagiline by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Ciprofloxacin may increase rasagiline concentration resulting in increased adverse reactions. Patients should be closely monitored during concomitant use of these drugs.

• ribociclib

  ribociclib increases toxicity of ciprofloxacin by QTc interval. Avoid or Use Alternate Drug.

• saquinavir

  saquinavir increases levels of ciprofloxacin by pharmacodynamic synergism. Avoid or Use Alternate Drug. Potential for increased toxicity. Increased risk of QT prolongation and cardiac arrhythmias.

• selinexor

  selinexor, ciprofloxacin. unspecified interaction mechanism. Avoid or Use Alternate Drug. Patients treated with selinexor may experience neurological toxicities. Avoid taking selinexor with other medications that may cause dizziness or confusion.

• sevoflurane

  sevoflurane and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• siponimod

  siponimod and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• sotorasib

  sotorasib will decrease the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If use is unavoidable, refer to the prescribing information of the P-gp substrate for dosage modifications.

• tepotinib

  tepotinib will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If concomitant use unavoidable, reduce the P-gp substrate dosage if recommended in its approved product labeling.

• theophylline

  ciprofloxacin will increase the level or effect of theophylline by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Concomitant use of theophylline and ciprofloxacin has decreased theophylline clearance and increased plasma levels and symptoms of toxicity. Serious and fatal reactions have included cardiac arrest, seizure, status epilepticus, and respiratory failure. If concomitant use cannot be avoided, monitor theophylline levels and adjust dosage as needed.
  
  ciprofloxacin will increase the level or effect of theophylline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Concomitant use of theophylline and ciprofloxacin has decreased theophylline clearance and increased plasma levels and symptoms of toxicity. Serious and fatal reactions have included cardiac arrest, seizure, status epilepticus, and respiratory failure. If concomitant use cannot be avoided, monitor theophylline levels and adjust dosage as needed.

• tizanidine

  ciprofloxacin will increase the level or effect of tizanidine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Coadministration of ciprofloxacin and tizanidine is contraindicated.

• toremifene

  ciprofloxacin and toremifene both increase QTc interval. Avoid or Use Alternate Drug. Concurrent use of toremifene with agents causing QT prolongation should be avoided. If concomitant use is required it's recommended that toremifene be interrupted. If interruption not possible, patients requiring therapy with a drug that prolongs QT should be closely monitored. ECGs should be obtained for high risk patients.

• tretinoin

  ciprofloxacin, tretinoin. Mechanism: pharmacodynamic synergism. Avoid or Use Alternate Drug. Both drugs have increased risk of phototoxicity, use caution with concomitant use.

• tretinoin topical

  ciprofloxacin, tretinoin topical. Mechanism: pharmacodynamic synergism. Avoid or Use Alternate Drug. Both drugs have increased risk of phototoxicity, use caution with concomitant use.

• trilaciclib

  trilaciclib will decrease the level or effect of ciprofloxacin by Other (see comment). Avoid or Use Alternate Drug. Avoid coadministration of trilaciclib (OCT2, MATE1, and MATE-2K inhibitor) with substrates where minimal increased concentration in kidney or blood may lead to serious or life-threatening toxicities.

• typhoid vaccine live

  ciprofloxacin decreases effects of typhoid vaccine live by pharmacodynamic antagonism. Contraindicated. Antibiotics may diminish the therapeutic effects of Typhoid Vaccine. Wait until Abx Tx complete to administer live bacterial vaccine.

• umeclidinium bromide/vilanterol inhaled

  ciprofloxacin increases toxicity of umeclidinium bromide/vilanterol inhaled by QTc interval. Avoid or Use Alternate Drug. Exercise extreme caution when vilanterol coadministered with drugs that prolong QTc interval; adrenergic agonist effects on the cardiovascular system may be potentiated.

• vandetanib

  ciprofloxacin, vandetanib. Either increases toxicity of the other by QTc interval. Avoid or Use Alternate Drug. Avoid coadministration with drugs known to prolong QT interval; if a drug known to prolong QT interval must be used, more frequent ECG monitoring is recommended.

• vemurafenib

  vemurafenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Concomitant use of vemurafenib with drugs that prolong QT interval is not recommended.

• venetoclax

  ciprofloxacin will increase the level or effect of venetoclax by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If a moderate CYP3A inhibitor must be used, reduce the venetoclax dose by at least 50%. Monitor more closely for signs of venetoclax toxicities.

• vilanterol/fluticasone furoate inhaled

  ciprofloxacin increases toxicity of vilanterol/fluticasone furoate inhaled by QTc interval. Avoid or Use Alternate Drug. Exercise extreme caution when vilanterol coadministered with drugs that prolong QTc interval; adrenergic agonist effects on the cardiovascular system may be potentiated.

Monitor Closely (242)

• acarbose

  ciprofloxacin increases effects of acarbose by pharmacodynamic synergism. Use Caution/Monitor. Quinolone antibiotic administration may result in hyper- or hypoglycemia. .

• albuterol

  albuterol and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• alfuzosin

  ciprofloxacin and alfuzosin both increase QTc interval. Use Caution/Monitor.
  
  alfuzosin and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• amifampridine

  ciprofloxacin increases toxicity of amifampridine by Other (see comment). Modify Therapy/Monitor Closely. Comment: Amifampridine can cause seizures. Coadministration with drugs that lower seizure threshold may increase this risk.

• amiodarone

  ciprofloxacin and amiodarone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• arformoterol

  arformoterol and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• aripiprazole

  aripiprazole and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• arsenic trioxide

  ciprofloxacin and arsenic trioxide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• artemether

  ciprofloxacin and artemether both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• artemether/lumefantrine

  ciprofloxacin and artemether/lumefantrine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• asenapine

  ciprofloxacin will increase the level or effect of asenapine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Asenapine has been associated with dose-related prolongation of the QT interval; asenapine should not be used with other agents also known to have this effect.
  
  ciprofloxacin and asenapine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• asenapine transdermal

  asenapine transdermal and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• aspirin

  aspirin decreases levels of ciprofloxacin by Other (see comment). Use Caution/Monitor. Comment: Buffered aspirin may decrease absorption of quinolones. Consider administering 2 hr before or 6 hr after, buffered aspirin administration.

• aspirin/citric acid/sodium bicarbonate

  aspirin/citric acid/sodium bicarbonate decreases levels of ciprofloxacin by Other (see comment). Use Caution/Monitor. Comment: Buffered aspirin may decrease absorption of quinolones. Consider administering 2 hr before or 6 hr after, buffered aspirin administration.

• atogepant

  ciprofloxacin will increase the level or effect of atogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• atomoxetine

  atomoxetine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• avapritinib

  ciprofloxacin will increase the level or effect of avapritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• axitinib

  ciprofloxacin increases levels of axitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• azithromycin

  azithromycin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor.

• bazedoxifene/conjugated estrogens

  ciprofloxacin will decrease the level or effect of bazedoxifene/conjugated estrogens by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• bedaquiline

  ciprofloxacin and bedaquiline both increase QTc interval. Modify Therapy/Monitor Closely. ECG should be monitored closely

• benazepril

  benazepril increases toxicity of ciprofloxacin by unknown mechanism. Use Caution/Monitor. ACE Inhibitors may increase arrhythmogenic potential of ciprofloxacin, possibly by increasing serum potassium levels.

• bendamustine

  ciprofloxacin increases levels of bendamustine by decreasing metabolism. Use Caution/Monitor. Decreased conversion of bendamustine to active metabolites. Concurrent administration of a CYP1A2 inhibitor such as ciprofloxacin may increase bendamustine concentrations. .

• berotralstat

  berotralstat will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor or titrate P-gp substrate dose if coadministered.

• betamethasone

  betamethasone, ciprofloxacin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• betaxolol

  ciprofloxacin increases levels of betaxolol by decreasing metabolism. Use Caution/Monitor. Consider modifying therapy; CYP1A2 inhibitors may decrease metabolism of 1A2 substrates.

• biotin

  biotin will decrease the level or effect of ciprofloxacin by altering intestinal flora. Applies only to oral form of both agents. Use Caution/Monitor. Administer ciprofloxacin 4 hours before or 2 hours after biotin.

• bosutinib

  bosutinib increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• caffeine

  ciprofloxacin will increase the level or effect of caffeine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. The hepatic metabolism of caffeine may be decreased by ciprofloxacin; pharmacologic effects of caffeine may be increased.

• calcium acetate

  calcium acetate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• calcium carbonate

  calcium carbonate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• calcium chloride

  calcium chloride decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• calcium citrate

  calcium citrate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• calcium gluconate

  calcium gluconate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• captopril

  captopril increases toxicity of ciprofloxacin by Mechanism: unspecified interaction mechanism. Use Caution/Monitor. ACE Inhibitors increase arrhythmogenic potential of ciprofloxacin. Monitor ECG and QT interval.

• carbamazepine

  ciprofloxacin will increase the level or effect of carbamazepine by decreasing metabolism. Modify Therapy/Monitor Closely. Monitor plasma levels when used concomitantly

• celecoxib

  ciprofloxacin, celecoxib. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• chloroquine

  chloroquine and ciprofloxacin both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• chlorpromazine

  ciprofloxacin and chlorpromazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• chlorpropamide

  ciprofloxacin increases effects of chlorpropamide by pharmacodynamic synergism. Use Caution/Monitor. Careful monitoring of blood glucose is recommended when quinolones and antidiabetic agents are coadministered. Hyperglycemia and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agent.

• citalopram

  ciprofloxacin and citalopram both increase QTc interval. Use Caution/Monitor. ECG monitoring is recommended, along with drugs that may prolong the QT interval.

• colchicine

  ciprofloxacin increases toxicity of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Fatal drug interactions reported when colchicine administered with dual inhibitor of CYP3A4 and P-glycoprotein; toxicities also reported when colchicine administered with inhibitors of CYP3A4; coadminister only if no other option available; contraindicated in renal or hepatic impairment with drugs that inhibit both P-gp and CYP3A4.

• conjugated estrogens

  ciprofloxacin will decrease the level or effect of conjugated estrogens by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• corticotropin

  corticotropin and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• cortisone

  cortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• crizotinib

  crizotinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor. ECG monitoring is recommended, along with drugs that may prolong the QT interval.

• danicopan

  danicopan will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Danicopan increases plasma concentrations of P-gp substrates; consider dose reduction of P-gp substrates where minimal concentration changes may lead to serious adverse reactions.

• dasatinib

  dasatinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• degarelix

  ciprofloxacin and degarelix both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• deutetrabenazine

  deutetrabenazine and ciprofloxacin both increase QTc interval. Use Caution/Monitor. At the maximum recommended dose, deutetrabenazine does not prolong QT interval to a clinically relevant extent. Certain circumstances may increase risk of torsade de pointes and/or sudden death in association with drugs that prolong the QTc interval (eg, bradycardia, hypokalemia or hypomagnesemia, coadministration with other drugs that prolong QTc interval, presence of congenital QT prolongation).

• dexamethasone

  dexamethasone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• dichlorphenamide

  dichlorphenamide and ciprofloxacin both decrease serum potassium. Use Caution/Monitor.

• diclofenac

  diclofenac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• dienogest/estradiol valerate

  ciprofloxacin will decrease the level or effect of dienogest/estradiol valerate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor. An alternate or additional form of birth control may be advisable during concomitant use.

• diflunisal

  diflunisal, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• disopyramide

  ciprofloxacin and disopyramide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• dofetilide

  ciprofloxacin and dofetilide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• dolasetron

  ciprofloxacin and dolasetron both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• donepezil

  donepezil and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• doxepin

  doxepin and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• droperidol

  ciprofloxacin and droperidol both decrease QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• duloxetine

  ciprofloxacin will increase the level or effect of duloxetine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Coadministration of CYP1A2 inhibiting quinolones with duloxetine may lead to significant increases in duloxetine levels, AUC, and half-life. Consider therapy modification if duloxetine is necessary.

• efavirenz

  efavirenz and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• elagolix

  elagolix will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• eliglustat

  eliglustat increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Monitor therapeutic drug concentrations, as indicated, or consider reducing the dosage of the P-gp substrate and titrate to clinical effect.

• eltrombopag

  ciprofloxacin will increase the level or effect of eltrombopag by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• eluxadoline

  ciprofloxacin increases levels of eluxadoline by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. As a precautionary measure due to incomplete information on the metabolism of eluxadoline, use caution when coadministered with strong CYP1A2 inhibitors.

• erlotinib

  ciprofloxacin increases levels of erlotinib by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. If severe adverse effects occur consider reducing erlotinib dose.

• erythromycin base

  ciprofloxacin and erythromycin base both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.

• erythromycin ethylsuccinate

  ciprofloxacin and erythromycin ethylsuccinate both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.

• erythromycin lactobionate

  ciprofloxacin and erythromycin lactobionate both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.

• erythromycin stearate

  ciprofloxacin and erythromycin stearate both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.

• escitalopram

  escitalopram increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor.

• estradiol

  ciprofloxacin will decrease the level or effect of estradiol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• estrogens conjugated synthetic

  ciprofloxacin will decrease the level or effect of estrogens conjugated synthetic by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• estropipate

  ciprofloxacin will decrease the level or effect of estropipate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• ethinylestradiol

  ciprofloxacin will decrease the level or effect of ethinylestradiol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• etodolac

  etodolac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• etrasimod

  etrasimod, ciprofloxacin. Either increases effects of the other by QTc interval. Modify Therapy/Monitor Closely. Transient decrease in heart rate and AV conduction delays may occur when initiating etrasimod. Owing to potential of additive effect on heart rate, etrasimod may increase risk of QT prolongation and Torsades de Pointes when coadministered with Class Ia or Class III antiarrhythmic drugs, or other drugs that prolong the QT interval. .

• ezogabine

  ezogabine, ciprofloxacin. Either increases toxicity of the other by QTc interval. Use Caution/Monitor. Slight and transient QT-prolongation observed with ezogabine, particularly when dose titrated to 1200 mg/day. QT interval should be monitored when ezogabine is prescribed with agents known to increase QT interval.

• fenoprofen

  fenoprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• ferric citrate

  ferric citrate will decrease the level or effect of ciprofloxacin by drug binding in GI tract. Use Caution/Monitor. Take at least 2 hours before or after ferric citrate

• ferric maltol

  ferric maltol decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ferrous fumarate

  ferrous fumarate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ferrous gluconate

  ferrous gluconate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ferrous sulfate

  ferrous sulfate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• finerenone

  ciprofloxacin will increase the level or effect of finerenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Monitor serum potassium during initiation and dosage adjustment of either finererone or weak CYP3A4 inhibitors. Adjust finererone dosage as needed.

• fingolimod

  fingolimod and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• flecainide

  ciprofloxacin and flecainide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• fludrocortisone

  fludrocortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• fluoxetine

  ciprofloxacin and fluoxetine both increase QTc interval. Modify Therapy/Monitor Closely.

• flurbiprofen

  flurbiprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• fostamatinib

  fostamatinib will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Concomitant use of fostamatinib may increase concentrations of P-gp substrates. Monitor for toxicities of the P-gp substrate drug that may require dosage reduction when given concurrently with fostamatinib.

• fostemsavir

  ciprofloxacin and fostemsavir both increase QTc interval. Use Caution/Monitor. QTc prolongation reported with higher than recommended doses of fostemsavir.

• gemtuzumab

  ciprofloxacin and gemtuzumab both increase QTc interval. Use Caution/Monitor.

• gepirone

  gepirone and ciprofloxacin both increase QTc interval. Modify Therapy/Monitor Closely.

• gilteritinib

  gilteritinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• glecaprevir/pibrentasvir

  glecaprevir/pibrentasvir will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• glimepiride

  ciprofloxacin increases effects of glimepiride by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• glipizide

  ciprofloxacin increases effects of glipizide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• glyburide

  ciprofloxacin increases effects of glyburide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• goserelin

  goserelin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• granisetron

  granisetron and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• haloperidol

  ciprofloxacin and haloperidol both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• histrelin

  histrelin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• hydrocortisone

  hydrocortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• hydrocortisone rectal

  hydrocortisone rectal and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• hydroxyzine

  hydroxyzine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• ibuprofen

  ibuprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• ibuprofen IV

  ibuprofen IV, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• ibutilide

  ciprofloxacin and ibutilide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• ifosfamide

  ciprofloxacin will decrease the level or effect of ifosfamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Use of a CYP3A4 inhibitor may decrease metabolism of ifosfamide, potentially reducing ifosfamide therapeutic effects.

• iloperidone

  ciprofloxacin and iloperidone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• indacaterol, inhaled

  indacaterol, inhaled, ciprofloxacin. QTc interval. Use Caution/Monitor. Drugs that are known to prolong the QTc interval may have an increased the risk of ventricular arrhythmias.

• indomethacin

  indomethacin, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• insulin aspart

  ciprofloxacin increases effects of insulin aspart by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• insulin lispro

  ciprofloxacin increases effects of insulin lispro by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• insulin regular human

  ciprofloxacin increases effects of insulin regular human by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• iron dextran complex

  iron dextran complex decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• isavuconazonium sulfate

  ciprofloxacin will increase the level or effect of isavuconazonium sulfate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• istradefylline

  istradefylline will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Istradefylline 40 mg/day increased peak levels and AUC of P-gp substrates in clinical trials. Consider dose reduction of sensitive P-gp substrates.

• itraconazole

  itraconazole and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• ivacaftor

  ivacaftor increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Ivacaftor and its M1 metabolite has the potential to inhibit P-gp; may significantly increase systemic exposure to sensitive P-gp substrates with a narrow therapeutic index.
  
  ciprofloxacin increases levels of ivacaftor by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor when coadministered with weak CYP3A4 inhibitors .

• ivosidenib

  ciprofloxacin will increase the level or effect of ivosidenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration with moderate CYP3A4 inhibitors may increase ivosidenib plasma concentrations, thus increasing the risk of QTc prolongation. Monitor for increased risk of QTc interval prolongation.

• ketoprofen

  ketoprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• ketorolac

  ketorolac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• lanthanum carbonate

  lanthanum carbonate decreases levels of ciprofloxacin by cation binding in GI tract. Use Caution/Monitor. Administer oral quinolone antibiotics at least 1 hr before or 4 hr after lanthanum. Interaction applies only to oral quinolones.

• lemborexant

  ciprofloxacin will increase the level or effect of lemborexant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Lower nightly dose of lemborexant recommended if coadministered with weak CYP3A4 inhibitors. See drug monograph for specific dosage modification.

• lenvatinib

  ciprofloxacin and lenvatinib both increase QTc interval. Use Caution/Monitor. Lenvatinib prescribing information recommends monitoring ECG closely when coadministered with QT prolonging drugs.

• leuprolide

  leuprolide increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• levonorgestrel oral/ethinylestradiol/ferrous bisglycinate

  ciprofloxacin will decrease the level or effect of levonorgestrel oral/ethinylestradiol/ferrous bisglycinate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor. Antibiotics may decrease hormonal contraceptive efficacy.

• lidocaine

  ciprofloxacin will increase the level or effect of lidocaine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Lidocaine plasma levels may be elevated, increasing the risk of toxicity. Monitor cardiac function and symptoms of toxicity.

• lithium

  lithium and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• lomitapide

  ciprofloxacin increases levels of lomitapide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Lomitapide dose should not exceed 30 mg/day.
  
  lomitapide increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Consider reducing dose when used concomitantly with lomitapide.

• lumefantrine

  ciprofloxacin and lumefantrine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• magnesium chloride

  magnesium chloride decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium citrate

  magnesium citrate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium hydroxide

  magnesium hydroxide decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium oxide

  magnesium oxide decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Separate by 2 hours.

• magnesium sulfate

  magnesium sulfate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium supplement

  magnesium supplement will decrease the level or effect of ciprofloxacin by Other (see comment). Modify Therapy/Monitor Closely. Formation of an insoluble complex reduces absorption of the drug through intestinal tract; administer magnesium 2hr before the quinolone or 6hr after the quinolone

• meclofenamate

  meclofenamate, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• mefenamic acid

  mefenamic acid, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• mefloquine

  ciprofloxacin and mefloquine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• melatonin

  ciprofloxacin will increase the level or effect of melatonin by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Monitor melatonin effects if coadministered with moderate CYP1A2 inhibitors

• meloxicam

  meloxicam, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• mestranol

  ciprofloxacin will decrease the level or effect of mestranol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• metformin

  ciprofloxacin increases effects of metformin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• methadone

  ciprofloxacin and methadone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• methotrexate

  ciprofloxacin will increase the level or effect of methotrexate by Other (see comment). Use Caution/Monitor. Renal tubular transport of methotrexate may be inhibited by coadministration of ciprofloxacin, potentially leading to increased methotrexate plasma levels and toxicity.

• methylprednisolone

  methylprednisolone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• mexiletine

  ciprofloxacin will increase the level or effect of mexiletine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Mexiletine concentrations may be elevated and may produce an increase in therapeutic and adverse reactions.

• midazolam intranasal

  ciprofloxacin will increase the level or effect of midazolam intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration of mild CYP3A4 inhibitors with midazolam intranasal may cause higher midazolam systemic exposure, which may prolong sedation.

• mifepristone

  ciprofloxacin will increase the level or effect of mifepristone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Use alternatives if available.

• miglitol

  ciprofloxacin increases effects of miglitol by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• mometasone inhaled

  mometasone inhaled and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• moxifloxacin

  ciprofloxacin and moxifloxacin both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• nabumetone

  nabumetone, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• naproxen

  naproxen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• nateglinide

  ciprofloxacin increases effects of nateglinide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• nilotinib

  ciprofloxacin and nilotinib both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• olanzapine

  ciprofloxacin will increase the level or effect of olanzapine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Olanzapine plasma concentrations may be elevated, increasing the risk of adverse reactions such as orthostatic hypotension or sedation. It is important to use caution and observe patient and adjust the olanzapine dosage as needed.

• olodaterol inhaled

  ciprofloxacin and olodaterol inhaled both increase QTc interval. Use Caution/Monitor. Drugs that prolong the QTc interval and may potentiate the effects of beta2 agonists on the cardiovascular system; increased risk of ventricular arrhythmias

• omeprazole

  omeprazole will decrease the level or effect of ciprofloxacin by unknown mechanism. Use Caution/Monitor. Absorption of the ciprofloxacin ER tablet was slightly diminished (20%) when coadministered with omeprazole.

• osilodrostat

  osilodrostat and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• osimertinib

  osimertinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor. Conduct periodic monitoring with ECGs and electrolytes in patients taking drugs known to prolong the QTc interval.

• oxaliplatin

  oxaliplatin will increase the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Monitor for ECG changes if therapy is initiated in patients with drugs known to prolong QT interval.

• oxaprozin

  oxaprozin, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• ozanimod

  ozanimod and ciprofloxacin both increase QTc interval. Modify Therapy/Monitor Closely. The potential additive effects on heart rate, treatment with ozanimod should generally not be initiated in patients who are concurrently treated with QT prolonging drugs with known arrhythmogenic properties.

• paliperidone

  ciprofloxacin and paliperidone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• pasireotide

  ciprofloxacin and pasireotide both increase QTc interval. Modify Therapy/Monitor Closely.

• patiromer

  patiromer will decrease the level or effect of ciprofloxacin by drug binding in GI tract. Modify Therapy/Monitor Closely. Separate administration by at least 3 hr from patiromer

• pentamidine

  ciprofloxacin and pentamidine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• pentoxifylline

  ciprofloxacin will increase the level or effect of pentoxifylline by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• phenytoin

  ciprofloxacin decreases effects of phenytoin by unknown mechanism. Use Caution/Monitor. Ciprofloxacin has been reported to both increase and decrease phenytoin concentrations. Additional clinical evidence is needed however; phenytoin serum concentrations should be monitored in patients.

• pimozide

  ciprofloxacin and pimozide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• pioglitazone

  ciprofloxacin increases effects of pioglitazone by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• piroxicam

  piroxicam, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• polysaccharide iron

  polysaccharide iron decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ponatinib

  ponatinib increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• prednisolone

  prednisolone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• prednisone

  prednisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• pretomanid

  pretomanid will increase the level or effect of ciprofloxacin by Other (see comment). Modify Therapy/Monitor Closely. In vitro studies demonstrated that pretomanid significantly inhibits OAT3; monitor for increased adverse effects and consider dosage reduction for OAT3 substrates.

• primaquine

  primaquine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• probenecid

  probenecid will increase the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Probenecid interferes with renal tubular secretion of ciprofloxacin and produces an increase in the ciprofloxacin levels in the serum

• procainamide

  ciprofloxacin and procainamide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• quetiapine

  quetiapine, ciprofloxacin. Either increases toxicity of the other by QTc interval. Use Caution/Monitor. Avoid use with drugs that prolong QT and in patients with risk factors for prolonged QT interval. Postmarketing cases show QT prolongation with overdose in patients with concomitant illness or with drugs known to cause electrolyte imbalance or prolong QT.

• quinapril

  quinapril will decrease the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Separate doses of quinapril and oral quinolones by 2 hr; interaction likely due to chelation

• quinidine

  ciprofloxacin and quinidine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• quinine

  ciprofloxacin and quinine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• quizartinib

  quizartinib, ciprofloxacin. Either increases effects of the other by QTc interval. Modify Therapy/Monitor Closely. Monitor patients more frequently with ECG if coadministered with QT prolonging drugs.

• ramelteon

  ciprofloxacin will increase the level or effect of ramelteon by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Ciprofloxacin may decrease the metabolism of ramelteon; if ciprofloxacin is coadministered with ramelteon, monitor the patient closely for toxicity.

• ranolazine

  ciprofloxacin and ranolazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• repaglinide

  ciprofloxacin increases effects of repaglinide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• rilpivirine

  rilpivirine increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Rilpivirine should be used with caution when co-administered with a drug with a known risk of Torsades de Pointes.

• riluzole

  ciprofloxacin will increase the level or effect of riluzole by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• ropinirole

  ciprofloxacin will increase the level or effect of ropinirole by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Ciprofloxacin may decrease the metabolism of ropinirole; monitor for increased effects of ropinirole.

• ropivacaine

  ciprofloxacin will increase the level or effect of ropivacaine by Mechanism: decreasing metabolism. Use Caution/Monitor. Monitor for increased ropivacaine toxicity.

• rosiglitazone

  ciprofloxacin increases effects of rosiglitazone by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• saquinavir

  ciprofloxacin and saquinavir both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• sarecycline

  sarecycline will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor for toxicities of P-gp substrates that may require dosage reduction when coadministered with P-gp inhibitors.

• saxagliptin

  ciprofloxacin increases effects of saxagliptin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• selpercatinib

  selpercatinib increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor.

• sertraline

  sertraline and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• sevelamer

  sevelamer decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Administer oral quinolones at least 1 hour before or 3 hours after sevelamer. .

• sitagliptin

  ciprofloxacin increases effects of sitagliptin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• sodium bicarbonate

  sodium bicarbonate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. A large proportion of ciprofloxacin is normally excreted unchanged in the urine. When urinary alkalinizing agents such as sodium bicarbonate are used concomitantly, the solubility of ciprofloxacin can be decreased because of alkaline urine. Patients should be monitored for crystalluria and nephrotoxicity.

• sodium citrate/citric acid

  sodium citrate/citric acid decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. A large proportion of ciprofloxacin is normally excreted unchanged in the urine. When urinary alkalinizing agents such as sodium citrate are used concomitantly, the solubility of ciprofloxacin can be decreased because of alkaline urine. Patients should be monitored for crystalluria and nephrotoxicity.

• sodium picosulfate/magnesium oxide/anhydrous citric acid

  ciprofloxacin decreases effects of sodium picosulfate/magnesium oxide/anhydrous citric acid by altering metabolism. Use Caution/Monitor. Coadministration with antibiotics decreases efficacy by altering colonic bacterial flora needed to convert sodium picosulfate to active drug.
  
  sodium picosulfate/magnesium oxide/anhydrous citric acid decreases levels of ciprofloxacin by cation binding in GI tract. Use Caution/Monitor. Take at least 2 hours before and not less than 6 hours after administration of sodium picosulfate, magnesium oxide and anhydrous citric acid to avoid magnesium chelation.

• sodium sulfate/?magnesium sulfate/potassium chloride

  sodium sulfate/?magnesium sulfate/potassium chloride decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Modify Therapy/Monitor Closely. Administer fluoroquinolones at least 2 hr before and no less than 6 hr after each dose to avoid chelation with magnesium. .

• sodium sulfate/potassium sulfate/magnesium sulfate

  sodium sulfate/potassium sulfate/magnesium sulfate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Modify Therapy/Monitor Closely. Administer fluoroquinolones at least 2 hr before and no less than 6 hr after each dose to avoid chelation with magnesium. .

• solifenacin

  solifenacin and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• sorafenib

  sorafenib and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• sotalol

  ciprofloxacin and sotalol both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• stiripentol

  stiripentol will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Consider reducing the dose of P-glycoprotein (P-gp) substrates, if adverse reactions are experienced when administered concomitantly with stiripentol.

• sucralfate

  sucralfate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. The oral absorption of ciprofloxacin may be significantly reduced by sucralfate secondary to chelation within the GI tract. To help avoid interactions due to chelation, ciprofloxacin should be taken 2 hours before or 6 hours after administration of sucralfate.

• sulindac

  sulindac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• sunitinib

  ciprofloxacin and sunitinib both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• tacrolimus

  tacrolimus and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• tasimelteon

  ciprofloxacin will increase the level or effect of tasimelteon by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Avoid coadministration; potentially large increase in tasimelteon exposure and greater risk of adverse reactions with strong CYP1A2 inhibitors

• telavancin

  ciprofloxacin and telavancin both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• terbinafine

  ciprofloxacin will increase the level or effect of terbinafine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• tetrabenazine

  ciprofloxacin and tetrabenazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• thioridazine

  ciprofloxacin and thioridazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• tinidazole

  ciprofloxacin will increase the level or effect of tinidazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• tobramycin inhaled

  tobramycin inhaled and ciprofloxacin both increase nephrotoxicity and/or ototoxicity. Modify Therapy/Monitor Closely. Avoid concurrent or sequential use to decrease risk for ototoxicity

• tolazamide

  ciprofloxacin increases effects of tolazamide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• tolbutamide

  ciprofloxacin increases effects of tolbutamide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• tolmetin

  tolmetin, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• triamcinolone acetonide injectable suspension

  triamcinolone acetonide injectable suspension and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• trimagnesium citrate anhydrous

  trimagnesium citrate anhydrous decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Multivalent cation-containing products may reduce bioavailability of quinolones; administer quinolone at least 2 hr before or 6 hr after magnesium; use alternatives if available.

• triptorelin

  triptorelin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• tucatinib

  tucatinib will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Consider reducing the dosage of P-gp substrates, where minimal concentration changes may lead to serious or life-threatening toxicities.

• vadadustat

  vadadustat will increase the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Vadadustat may increase exposure of OAT3 substrates. Monitor for signs of adverse effect of OAT3 substrate and reduce substrate dose in accordance with their product labeling.

• valbenazine

  valbenazine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• vildagliptin

  ciprofloxacin increases effects of vildagliptin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• voclosporin

  voclosporin, ciprofloxacin. Either increases effects of the other by QTc interval. Use Caution/Monitor.

• vorinostat

  vorinostat and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• warfarin

  ciprofloxacin increases effects of warfarin by unspecified interaction mechanism. Use Caution/Monitor.

• zinc

  zinc will decrease the level or effect of ciprofloxacin by cation binding in GI tract. Modify Therapy/Monitor Closely. Ciprofloxacin should be administered 2 hr before or 6 hr after zinc salts.

• ziprasidone

  ciprofloxacin and ziprasidone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• zolpidem

  ciprofloxacin will increase the level or effect of zolpidem by affecting hepatic enzyme CYP1A2 metabolism. Modify Therapy/Monitor Closely.
  
  ciprofloxacin will increase the level or effect of zolpidem by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely.

Minor (34)

• acebutolol

  ciprofloxacin increases levels of acebutolol by decreasing metabolism. Minor/Significance Unknown. May also rarely decrease beta blocker levels.

• alprazolam

  ciprofloxacin increases levels of alprazolam by decreasing metabolism. Minor/Significance Unknown.

• balsalazide

  ciprofloxacin will decrease the level or effect of balsalazide by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• carvedilol

  ciprofloxacin increases levels of carvedilol by decreasing metabolism. Minor/Significance Unknown. May also rarely decrease beta blocker levels.

• chlordiazepoxide

  ciprofloxacin increases levels of chlordiazepoxide by decreasing metabolism. Minor/Significance Unknown.

• clonazepam

  ciprofloxacin increases levels of clonazepam by decreasing metabolism. Minor/Significance Unknown.

• clorazepate

  ciprofloxacin increases levels of clorazepate by decreasing metabolism. Minor/Significance Unknown.

• diazepam

  ciprofloxacin increases levels of diazepam by decreasing metabolism. Minor/Significance Unknown.

• digoxin

  ciprofloxacin will increase the level or effect of digoxin by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• esmolol

  ciprofloxacin increases levels of esmolol by decreasing metabolism. Minor/Significance Unknown.

• estazolam

  ciprofloxacin increases levels of estazolam by decreasing metabolism. Minor/Significance Unknown.

• fennel

  fennel decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown. Fennel may decrease the amount of ciprofloxacin the body absorbs. Take fennel at least 1 hour after ciprofloxacin administration.

• flurazepam

  ciprofloxacin increases levels of flurazepam by decreasing metabolism. Minor/Significance Unknown.

• foscarnet

  ciprofloxacin, foscarnet. Mechanism: unknown. Minor/Significance Unknown. Based on 2 case reports it was reported that there is a potential for an increased risk of seizures.

• frovatriptan

  ciprofloxacin will increase the level or effect of frovatriptan by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.

• green tea

  ciprofloxacin increases levels of green tea by decreasing elimination. Minor/Significance Unknown. (Caffeine). Some quinolones can inhibit the hepatic clearance of caffeine. Caution is advised.

• isotretinoin

  ciprofloxacin, isotretinoin. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Both drugs have increased risk of phototoxicity, use caution with concomitant use.

• metoprolol

  ciprofloxacin increases levels of metoprolol by decreasing metabolism. Minor/Significance Unknown. Ciprofloxacin may increase metoprolol plasma concentrations however mechanism is unknown. Further clinical evidence is needed but it may be appropriate to monitor patients during concomitant therapy with ciprofloxacin.

• midazolam

  ciprofloxacin increases levels of midazolam by decreasing metabolism. Minor/Significance Unknown.

• nadolol

  ciprofloxacin increases levels of nadolol by decreasing metabolism. Minor/Significance Unknown.

• nebivolol

  ciprofloxacin increases levels of nebivolol by decreasing metabolism. Minor/Significance Unknown.

• penbutolol

  ciprofloxacin increases levels of penbutolol by decreasing metabolism. Minor/Significance Unknown.

• pindolol

  ciprofloxacin increases levels of pindolol by decreasing metabolism. Minor/Significance Unknown.

• propranolol

  ciprofloxacin increases levels of propranolol by decreasing metabolism. Minor/Significance Unknown.

• pyridoxine

  ciprofloxacin will decrease the level or effect of pyridoxine by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• quazepam

  ciprofloxacin increases levels of quazepam by decreasing metabolism. Minor/Significance Unknown.

• quercetin

  quercetin decreases effects of ciprofloxacin by pharmacodynamic antagonism. Minor/Significance Unknown.

• ruxolitinib

  ciprofloxacin will increase the level or effect of ruxolitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• ruxolitinib topical

  ciprofloxacin will increase the level or effect of ruxolitinib topical by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• temazepam

  ciprofloxacin increases levels of temazepam by decreasing metabolism. Minor/Significance Unknown.

• thiamine

  ciprofloxacin will decrease the level or effect of thiamine by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• timolol

  ciprofloxacin increases levels of timolol by decreasing metabolism. Minor/Significance Unknown. May also rarely decrease beta blocker levels.

• triazolam

  ciprofloxacin increases levels of triazolam by decreasing metabolism. Minor/Significance Unknown.

• vitamin K1 (phytonadione)

  ciprofloxacin will decrease the level or effect of vitamin K1 (phytonadione) by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• acarbose

  Monitor Closely (1)ciprofloxacin increases effects of acarbose by pharmacodynamic synergism. Use Caution/Monitor. Quinolone antibiotic administration may result in hyper- or hypoglycemia. .

• acebutolol

  Minor (1)ciprofloxacin increases levels of acebutolol by decreasing metabolism. Minor/Significance Unknown. May also rarely decrease beta blocker levels.

• albuterol

  Monitor Closely (1)albuterol and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• alfuzosin

  Monitor Closely (2)ciprofloxacin and alfuzosin both increase QTc interval. Use Caution/Monitor.
  
  alfuzosin and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• alosetron

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of alosetron by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Alosetron is associated with potentially serious and life-threatening, dose-related gastrointestinal adverse effects, concomitant use with CYP450 1A2 inhibitors should generally be avoided if possible.

• alprazolam

  Minor (1)ciprofloxacin increases levels of alprazolam by decreasing metabolism. Minor/Significance Unknown.

• aluminum hydroxide

  Serious - Use Alternative (1)aluminum hydroxide decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Separate by 2 hours.

• amifampridine

  Monitor Closely (1)ciprofloxacin increases toxicity of amifampridine by Other (see comment). Modify Therapy/Monitor Closely. Comment: Amifampridine can cause seizures. Coadministration with drugs that lower seizure threshold may increase this risk.

• aminolevulinic acid oral

  Serious - Use Alternative (1)aminolevulinic acid oral, ciprofloxacin. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Avoid administering other phototoxic drugs with aminolevulinic acid oral for 24 hr during perioperative period.

• aminolevulinic acid topical

  Serious - Use Alternative (1)ciprofloxacin increases toxicity of aminolevulinic acid topical by pharmacodynamic synergism. Avoid or Use Alternate Drug. Coadministration of photosensitizing drugs may enhance the phototoxic reaction to photodynamic therapy with aminolevulinic acid.

• amiodarone

  Monitor Closely (1)ciprofloxacin and amiodarone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• amisulpride

  Serious - Use Alternative (1)amisulpride and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. ECG monitoring is recommended if coadministered.

• anagrelide

  Serious - Use Alternative (1)anagrelide and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• arformoterol

  Monitor Closely (1)arformoterol and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• aripiprazole

  Monitor Closely (1)aripiprazole and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• arsenic trioxide

  Monitor Closely (1)ciprofloxacin and arsenic trioxide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• artemether

  Monitor Closely (1)ciprofloxacin and artemether both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• artemether/lumefantrine

  Monitor Closely (1)ciprofloxacin and artemether/lumefantrine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• asenapine

  Monitor Closely (2)ciprofloxacin will increase the level or effect of asenapine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Asenapine has been associated with dose-related prolongation of the QT interval; asenapine should not be used with other agents also known to have this effect.
  
  ciprofloxacin and asenapine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• asenapine transdermal

  Monitor Closely (1)asenapine transdermal and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• aspirin

  Monitor Closely (1)aspirin decreases levels of ciprofloxacin by Other (see comment). Use Caution/Monitor. Comment: Buffered aspirin may decrease absorption of quinolones. Consider administering 2 hr before or 6 hr after, buffered aspirin administration.

• aspirin/citric acid/sodium bicarbonate

  Monitor Closely (1)aspirin/citric acid/sodium bicarbonate decreases levels of ciprofloxacin by Other (see comment). Use Caution/Monitor. Comment: Buffered aspirin may decrease absorption of quinolones. Consider administering 2 hr before or 6 hr after, buffered aspirin administration.

• atogepant

  Monitor Closely (1)ciprofloxacin will increase the level or effect of atogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• atomoxetine

  Monitor Closely (1)atomoxetine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• avapritinib

  Monitor Closely (1)ciprofloxacin will increase the level or effect of avapritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• axitinib

  Monitor Closely (1)ciprofloxacin increases levels of axitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• azithromycin

  Monitor Closely (1)azithromycin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor.

• balsalazide

  Minor (1)ciprofloxacin will decrease the level or effect of balsalazide by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• bazedoxifene/conjugated estrogens

  Monitor Closely (1)ciprofloxacin will decrease the level or effect of bazedoxifene/conjugated estrogens by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• BCG vaccine live

  Serious - Use Alternative (1)ciprofloxacin decreases effects of BCG vaccine live by pharmacodynamic antagonism. Contraindicated. Antibiotics may diminish therapeutic effects of BCG. Wait until Abx Tx complete to administer live bacterial vaccine.

• bedaquiline

  Monitor Closely (1)ciprofloxacin and bedaquiline both increase QTc interval. Modify Therapy/Monitor Closely. ECG should be monitored closely

• benazepril

  Monitor Closely (1)benazepril increases toxicity of ciprofloxacin by unknown mechanism. Use Caution/Monitor. ACE Inhibitors may increase arrhythmogenic potential of ciprofloxacin, possibly by increasing serum potassium levels.

• bendamustine

  Monitor Closely (1)ciprofloxacin increases levels of bendamustine by decreasing metabolism. Use Caution/Monitor. Decreased conversion of bendamustine to active metabolites. Concurrent administration of a CYP1A2 inhibitor such as ciprofloxacin may increase bendamustine concentrations. .

• berotralstat

  Monitor Closely (1)berotralstat will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor or titrate P-gp substrate dose if coadministered.

• betamethasone

  Monitor Closely (1)betamethasone, ciprofloxacin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• betaxolol

  Monitor Closely (1)ciprofloxacin increases levels of betaxolol by decreasing metabolism. Use Caution/Monitor. Consider modifying therapy; CYP1A2 inhibitors may decrease metabolism of 1A2 substrates.

• biotin

  Monitor Closely (1)biotin will decrease the level or effect of ciprofloxacin by altering intestinal flora. Applies only to oral form of both agents. Use Caution/Monitor. Administer ciprofloxacin 4 hours before or 2 hours after biotin.

• bosutinib

  Monitor Closely (1)bosutinib increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• buprenorphine

  Serious - Use Alternative (1)buprenorphine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine buccal

  Serious - Use Alternative (1)buprenorphine buccal and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine subdermal implant

  Serious - Use Alternative (1)buprenorphine subdermal implant and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine transdermal

  Serious - Use Alternative (1)buprenorphine transdermal and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine, long-acting injection

  Serious - Use Alternative (1)buprenorphine, long-acting injection and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• caffeine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of caffeine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. The hepatic metabolism of caffeine may be decreased by ciprofloxacin; pharmacologic effects of caffeine may be increased.

• calcium acetate

  Monitor Closely (1)calcium acetate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• calcium carbonate

  Monitor Closely (1)calcium carbonate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• calcium chloride

  Monitor Closely (1)calcium chloride decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• calcium citrate

  Monitor Closely (1)calcium citrate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• calcium gluconate

  Monitor Closely (1)calcium gluconate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• captopril

  Monitor Closely (1)captopril increases toxicity of ciprofloxacin by Mechanism: unspecified interaction mechanism. Use Caution/Monitor. ACE Inhibitors increase arrhythmogenic potential of ciprofloxacin. Monitor ECG and QT interval.

• carbamazepine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of carbamazepine by decreasing metabolism. Modify Therapy/Monitor Closely. Monitor plasma levels when used concomitantly

• carbonyl iron

  Serious - Use Alternative (1)carbonyl iron decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

• carvedilol

  Minor (1)ciprofloxacin increases levels of carvedilol by decreasing metabolism. Minor/Significance Unknown. May also rarely decrease beta blocker levels.

• celecoxib

  Monitor Closely (1)ciprofloxacin, celecoxib. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• ceritinib

  Serious - Use Alternative (1)ceritinib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• chlordiazepoxide

  Minor (1)ciprofloxacin increases levels of chlordiazepoxide by decreasing metabolism. Minor/Significance Unknown.

• chloroquine

  Monitor Closely (1)chloroquine and ciprofloxacin both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• chlorpromazine

  Monitor Closely (1)ciprofloxacin and chlorpromazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• chlorpropamide

  Monitor Closely (1)ciprofloxacin increases effects of chlorpropamide by pharmacodynamic synergism. Use Caution/Monitor. Careful monitoring of blood glucose is recommended when quinolones and antidiabetic agents are coadministered. Hyperglycemia and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agent.

• cholera vaccine

  Serious - Use Alternative (1)ciprofloxacin, cholera vaccine. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Avoid coadministration of cholera vaccine with systemic antibiotics since these agents may be active against the vaccine strain. Do not administer cholera vaccine to patients who have received oral or parenteral antibiotics within 14 days prior to vaccination.

• citalopram

  Monitor Closely (1)ciprofloxacin and citalopram both increase QTc interval. Use Caution/Monitor. ECG monitoring is recommended, along with drugs that may prolong the QT interval.

• clarithromycin

  Serious - Use Alternative (1)clarithromycin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• clomipramine

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of clomipramine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Concurrent use of drugs that can cause QT interval prolongation may result in additive effects and increased risk of ventricular arrhythmias. It is important to monitor therapy carefully.

• clonazepam

  Minor (1)ciprofloxacin increases levels of clonazepam by decreasing metabolism. Minor/Significance Unknown.

• clorazepate

  Minor (1)ciprofloxacin increases levels of clorazepate by decreasing metabolism. Minor/Significance Unknown.

• clozapine

  Serious - Use Alternative (2)ciprofloxacin will increase the level or effect of clozapine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Use caution when administering ciprofloxacin in patients receiving drugs that prolong the QT interval. At elevated serum concentrations, clozapine may produce clinically significant prolongation of the QTc interval.
  
  clozapine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• cobimetinib

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of cobimetinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concurrent short term (14 days or less) use of moderate CYP3A inhibitors is unavoidable for patients who are taking cobimetinib 60 mg, reduce the cobimetinib dose to 20 mg. After discontinuation of a moderate CYP3A inhibitor, resume cobimetinib 60 mg. Use an alternative to a moderate CYP3A inhibitor in patients who are taking a reduced dose of cobimetinib (40 or 20 mg daily).

• colchicine

  Monitor Closely (1)ciprofloxacin increases toxicity of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Fatal drug interactions reported when colchicine administered with dual inhibitor of CYP3A4 and P-glycoprotein; toxicities also reported when colchicine administered with inhibitors of CYP3A4; coadminister only if no other option available; contraindicated in renal or hepatic impairment with drugs that inhibit both P-gp and CYP3A4.

• conjugated estrogens

  Monitor Closely (1)ciprofloxacin will decrease the level or effect of conjugated estrogens by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• corticotropin

  Monitor Closely (1)corticotropin and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• cortisone

  Monitor Closely (1)cortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• crizotinib

  Monitor Closely (1)crizotinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor. ECG monitoring is recommended, along with drugs that may prolong the QT interval.

• danicopan

  Monitor Closely (1)danicopan will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Danicopan increases plasma concentrations of P-gp substrates; consider dose reduction of P-gp substrates where minimal concentration changes may lead to serious adverse reactions.

• dasatinib

  Monitor Closely (1)dasatinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• degarelix

  Monitor Closely (1)ciprofloxacin and degarelix both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• desflurane

  Serious - Use Alternative (1)desflurane and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• deutetrabenazine

  Monitor Closely (1)deutetrabenazine and ciprofloxacin both increase QTc interval. Use Caution/Monitor. At the maximum recommended dose, deutetrabenazine does not prolong QT interval to a clinically relevant extent. Certain circumstances may increase risk of torsade de pointes and/or sudden death in association with drugs that prolong the QTc interval (eg, bradycardia, hypokalemia or hypomagnesemia, coadministration with other drugs that prolong QTc interval, presence of congenital QT prolongation).

• dexamethasone

  Monitor Closely (1)dexamethasone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• diazepam

  Minor (1)ciprofloxacin increases levels of diazepam by decreasing metabolism. Minor/Significance Unknown.

• dichlorphenamide

  Monitor Closely (1)dichlorphenamide and ciprofloxacin both decrease serum potassium. Use Caution/Monitor.

• diclofenac

  Monitor Closely (1)diclofenac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• didanosine

  Serious - Use Alternative (1)didanosine decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Oral ciprofloxacin should not be administered simultaneously with didanosine (chewable tablets or powder for oral solution). Administer oral doses of ciprofloxacin 2 hours before or 6 hours after didanosine, chewable tablets or powder for oral solution.

• dienogest/estradiol valerate

  Monitor Closely (1)ciprofloxacin will decrease the level or effect of dienogest/estradiol valerate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor. An alternate or additional form of birth control may be advisable during concomitant use.

• diflunisal

  Monitor Closely (1)diflunisal, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• digoxin

  Minor (1)ciprofloxacin will increase the level or effect of digoxin by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• disopyramide

  Monitor Closely (1)ciprofloxacin and disopyramide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• dofetilide

  Monitor Closely (1)ciprofloxacin and dofetilide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.Serious - Use Alternative (1)dofetilide increases toxicity of ciprofloxacin by QTc interval. Avoid or Use Alternate Drug.

• dolasetron

  Monitor Closely (1)ciprofloxacin and dolasetron both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• donepezil

  Monitor Closely (1)donepezil and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• doxepin

  Monitor Closely (1)doxepin and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• dronedarone

  Serious - Use Alternative (1)ciprofloxacin and dronedarone both increase QTc interval. Avoid or Use Alternate Drug. The use of dronedarone in combination with other medications that can prolong the QT interval is contraindicated.

• droperidol

  Monitor Closely (1)ciprofloxacin and droperidol both decrease QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• duloxetine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of duloxetine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Coadministration of CYP1A2 inhibiting quinolones with duloxetine may lead to significant increases in duloxetine levels, AUC, and half-life. Consider therapy modification if duloxetine is necessary.

• efavirenz

  Monitor Closely (1)efavirenz and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• elagolix

  Monitor Closely (1)elagolix will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• eliglustat

  Monitor Closely (1)eliglustat increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Monitor therapeutic drug concentrations, as indicated, or consider reducing the dosage of the P-gp substrate and titrate to clinical effect.Serious - Use Alternative (1)eliglustat and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• eltrombopag

  Monitor Closely (1)ciprofloxacin will increase the level or effect of eltrombopag by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• eluxadoline

  Monitor Closely (1)ciprofloxacin increases levels of eluxadoline by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. As a precautionary measure due to incomplete information on the metabolism of eluxadoline, use caution when coadministered with strong CYP1A2 inhibitors.

• encorafenib

  Serious - Use Alternative (1)encorafenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• entrectinib

  Serious - Use Alternative (1)ciprofloxacin and entrectinib both increase QTc interval. Avoid or Use Alternate Drug.

• eribulin

  Serious - Use Alternative (1)eribulin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• erlotinib

  Monitor Closely (1)ciprofloxacin increases levels of erlotinib by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. If severe adverse effects occur consider reducing erlotinib dose.

• erythromycin base

  Monitor Closely (1)ciprofloxacin and erythromycin base both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.

• erythromycin ethylsuccinate

  Monitor Closely (1)ciprofloxacin and erythromycin ethylsuccinate both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.

• erythromycin lactobionate

  Monitor Closely (1)ciprofloxacin and erythromycin lactobionate both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.

• erythromycin stearate

  Monitor Closely (1)ciprofloxacin and erythromycin stearate both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.

• escitalopram

  Monitor Closely (1)escitalopram increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor.

• esmolol

  Minor (1)ciprofloxacin increases levels of esmolol by decreasing metabolism. Minor/Significance Unknown.

• estazolam

  Minor (1)ciprofloxacin increases levels of estazolam by decreasing metabolism. Minor/Significance Unknown.

• estradiol

  Monitor Closely (1)ciprofloxacin will decrease the level or effect of estradiol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• estrogens conjugated synthetic

  Monitor Closely (1)ciprofloxacin will decrease the level or effect of estrogens conjugated synthetic by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• estropipate

  Monitor Closely (1)ciprofloxacin will decrease the level or effect of estropipate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• ethinylestradiol

  Monitor Closely (1)ciprofloxacin will decrease the level or effect of ethinylestradiol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• etodolac

  Monitor Closely (1)etodolac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• etrasimod

  Monitor Closely (1)etrasimod, ciprofloxacin. Either increases effects of the other by QTc interval. Modify Therapy/Monitor Closely. Transient decrease in heart rate and AV conduction delays may occur when initiating etrasimod. Owing to potential of additive effect on heart rate, etrasimod may increase risk of QT prolongation and Torsades de Pointes when coadministered with Class Ia or Class III antiarrhythmic drugs, or other drugs that prolong the QT interval. .

• ezogabine

  Monitor Closely (1)ezogabine, ciprofloxacin. Either increases toxicity of the other by QTc interval. Use Caution/Monitor. Slight and transient QT-prolongation observed with ezogabine, particularly when dose titrated to 1200 mg/day. QT interval should be monitored when ezogabine is prescribed with agents known to increase QT interval.

• fennel

  Minor (1)fennel decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown. Fennel may decrease the amount of ciprofloxacin the body absorbs. Take fennel at least 1 hour after ciprofloxacin administration.

• fenoprofen

  Monitor Closely (1)fenoprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• ferric citrate

  Monitor Closely (1)ferric citrate will decrease the level or effect of ciprofloxacin by drug binding in GI tract. Use Caution/Monitor. Take at least 2 hours before or after ferric citrate

• ferric maltol

  Monitor Closely (1)ferric maltol decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ferrous fumarate

  Monitor Closely (1)ferrous fumarate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ferrous gluconate

  Monitor Closely (1)ferrous gluconate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ferrous sulfate

  Monitor Closely (1)ferrous sulfate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• fexinidazole

  Serious - Use Alternative (1)fexinidazole and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of fexinidazole with drugs known to block potassium channels and/or prolong QT interval.

• fezolinetant

  Contraindicated (1)ciprofloxacin will increase the level or effect of fezolinetant by affecting hepatic enzyme CYP1A2 metabolism. Contraindicated. Fezolinetant AUC and peak plasma concentration are increased if coadministered with drugs that are weak, moderate, or strong CYP1A2 inhibitors

• finerenone

  Monitor Closely (1)ciprofloxacin will increase the level or effect of finerenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Monitor serum potassium during initiation and dosage adjustment of either finererone or weak CYP3A4 inhibitors. Adjust finererone dosage as needed.

• fingolimod

  Monitor Closely (1)fingolimod and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• flecainide

  Monitor Closely (1)ciprofloxacin and flecainide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• flibanserin

  Contraindicated (1)ciprofloxacin will increase the level or effect of flibanserin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration of flibanserin with moderate or strong CYP3A4 inhibitors is contraindicated. Severe hypotension or syncope can occur.

• fludrocortisone

  Monitor Closely (1)fludrocortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• fluoxetine

  Monitor Closely (1)ciprofloxacin and fluoxetine both increase QTc interval. Modify Therapy/Monitor Closely.

• flurazepam

  Minor (1)ciprofloxacin increases levels of flurazepam by decreasing metabolism. Minor/Significance Unknown.

• flurbiprofen

  Monitor Closely (1)flurbiprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• foscarnet

  Minor (1)ciprofloxacin, foscarnet. Mechanism: unknown. Minor/Significance Unknown. Based on 2 case reports it was reported that there is a potential for an increased risk of seizures.

• fostamatinib

  Monitor Closely (1)fostamatinib will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Concomitant use of fostamatinib may increase concentrations of P-gp substrates. Monitor for toxicities of the P-gp substrate drug that may require dosage reduction when given concurrently with fostamatinib.

• fostemsavir

  Monitor Closely (1)ciprofloxacin and fostemsavir both increase QTc interval. Use Caution/Monitor. QTc prolongation reported with higher than recommended doses of fostemsavir.

• frovatriptan

  Minor (1)ciprofloxacin will increase the level or effect of frovatriptan by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.

• gemtuzumab

  Monitor Closely (1)ciprofloxacin and gemtuzumab both increase QTc interval. Use Caution/Monitor.

• gepirone

  Monitor Closely (1)gepirone and ciprofloxacin both increase QTc interval. Modify Therapy/Monitor Closely.

• gilteritinib

  Monitor Closely (1)gilteritinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• givinostat

  Serious - Use Alternative (1)ciprofloxacin and givinostat both increase QTc interval. Avoid or Use Alternate Drug. If unable to avoid coadministration, obtain ECGs when initiating, during concomitant use, and as clinically indicated. Withhold if QTc interval >500 ms or a change from baseline >60 ms.

• glasdegib

  Serious - Use Alternative (1)ciprofloxacin and glasdegib both increase QTc interval. Avoid or Use Alternate Drug. If coadministration unavoidable, monitor for increased risk of QTc interval prolongation.

• glecaprevir/pibrentasvir

  Monitor Closely (1)glecaprevir/pibrentasvir will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• glimepiride

  Monitor Closely (1)ciprofloxacin increases effects of glimepiride by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• glipizide

  Monitor Closely (1)ciprofloxacin increases effects of glipizide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• glyburide

  Monitor Closely (1)ciprofloxacin increases effects of glyburide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• goserelin

  Monitor Closely (1)goserelin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• granisetron

  Monitor Closely (1)granisetron and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• green tea

  Minor (1)ciprofloxacin increases levels of green tea by decreasing elimination. Minor/Significance Unknown. (Caffeine). Some quinolones can inhibit the hepatic clearance of caffeine. Caution is advised.

• haloperidol

  Monitor Closely (1)ciprofloxacin and haloperidol both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• histrelin

  Monitor Closely (1)histrelin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• hydrocortisone

  Monitor Closely (1)hydrocortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• hydrocortisone rectal

  Monitor Closely (1)hydrocortisone rectal and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• hydroxychloroquine sulfate

  Serious - Use Alternative (1)hydroxychloroquine sulfate and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• hydroxyzine

  Monitor Closely (1)hydroxyzine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• ibrutinib

  Serious - Use Alternative (1)ciprofloxacin increases levels of ibrutinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid concomitant use of ibrutinib and strong CYP3A4 inhibitors. If a strong CYP3A4 inhibitor must be used short-term (eg, anti-infectives for =7 days), interrupt ibrutinib therapy until strong CYP3A4 inhibitor is discontinued.

• ibuprofen

  Monitor Closely (1)ibuprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• ibuprofen IV

  Monitor Closely (1)ibuprofen IV, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• ibutilide

  Monitor Closely (1)ciprofloxacin and ibutilide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• ifosfamide

  Monitor Closely (1)ciprofloxacin will decrease the level or effect of ifosfamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Use of a CYP3A4 inhibitor may decrease metabolism of ifosfamide, potentially reducing ifosfamide therapeutic effects.

• iloperidone

  Monitor Closely (1)ciprofloxacin and iloperidone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• imipramine

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of imipramine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Concurrent use of drugs that can cause QT interval prolongation may result in additive effects and increased risk of ventricular arrhythmias. It is important to monitor therapy carefully.

• indacaterol, inhaled

  Monitor Closely (1)indacaterol, inhaled, ciprofloxacin. QTc interval. Use Caution/Monitor. Drugs that are known to prolong the QTc interval may have an increased the risk of ventricular arrhythmias.

• indomethacin

  Monitor Closely (1)indomethacin, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• inotuzumab

  Serious - Use Alternative (1)inotuzumab and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. If unable to avoid concomitant use, obtain ECGs and electrolytes before and after initiation of any drug known to prolong QTc, and periodically monitor as clinically indicated during treatment.

• insulin aspart

  Monitor Closely (1)ciprofloxacin increases effects of insulin aspart by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• insulin lispro

  Monitor Closely (1)ciprofloxacin increases effects of insulin lispro by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• insulin regular human

  Monitor Closely (1)ciprofloxacin increases effects of insulin regular human by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• iron dextran complex

  Monitor Closely (1)iron dextran complex decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• iron sucrose

  Serious - Use Alternative (1)iron sucrose decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• isavuconazonium sulfate

  Monitor Closely (1)ciprofloxacin will increase the level or effect of isavuconazonium sulfate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• isoflurane

  Serious - Use Alternative (1)isoflurane and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• isotretinoin

  Minor (1)ciprofloxacin, isotretinoin. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Both drugs have increased risk of phototoxicity, use caution with concomitant use.

• istradefylline

  Monitor Closely (1)istradefylline will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Istradefylline 40 mg/day increased peak levels and AUC of P-gp substrates in clinical trials. Consider dose reduction of sensitive P-gp substrates.

• itraconazole

  Monitor Closely (1)itraconazole and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• ivacaftor

  Monitor Closely (2)ivacaftor increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Ivacaftor and its M1 metabolite has the potential to inhibit P-gp; may significantly increase systemic exposure to sensitive P-gp substrates with a narrow therapeutic index.
  
  ciprofloxacin increases levels of ivacaftor by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor when coadministered with weak CYP3A4 inhibitors .

• ivosidenib

  Monitor Closely (1)ciprofloxacin will increase the level or effect of ivosidenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration with moderate CYP3A4 inhibitors may increase ivosidenib plasma concentrations, thus increasing the risk of QTc prolongation. Monitor for increased risk of QTc interval prolongation.Serious - Use Alternative (1)ivosidenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of QTc prolonging drugs with ivosidenib or replace with alternate therapies. If coadministration of a QTc prolonging drug is unavoidable, monitor for increased risk of QTc interval prolongation.

• ketoprofen

  Monitor Closely (1)ketoprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• ketorolac

  Monitor Closely (1)ketorolac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• lanthanum carbonate

  Monitor Closely (1)lanthanum carbonate decreases levels of ciprofloxacin by cation binding in GI tract. Use Caution/Monitor. Administer oral quinolone antibiotics at least 1 hr before or 4 hr after lanthanum. Interaction applies only to oral quinolones.

• lasmiditan

  Serious - Use Alternative (1)lasmiditan increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

• lefamulin

  Serious - Use Alternative (1)lefamulin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• lemborexant

  Monitor Closely (1)ciprofloxacin will increase the level or effect of lemborexant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Lower nightly dose of lemborexant recommended if coadministered with weak CYP3A4 inhibitors. See drug monograph for specific dosage modification.

• lenvatinib

  Monitor Closely (1)ciprofloxacin and lenvatinib both increase QTc interval. Use Caution/Monitor. Lenvatinib prescribing information recommends monitoring ECG closely when coadministered with QT prolonging drugs.

• leuprolide

  Monitor Closely (1)leuprolide increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• levonorgestrel oral/ethinylestradiol/ferrous bisglycinate

  Monitor Closely (1)ciprofloxacin will decrease the level or effect of levonorgestrel oral/ethinylestradiol/ferrous bisglycinate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor. Antibiotics may decrease hormonal contraceptive efficacy.

• lidocaine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of lidocaine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Lidocaine plasma levels may be elevated, increasing the risk of toxicity. Monitor cardiac function and symptoms of toxicity.

• lithium

  Monitor Closely (1)lithium and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• lomitapide

  Monitor Closely (2)ciprofloxacin increases levels of lomitapide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Lomitapide dose should not exceed 30 mg/day.
  
  lomitapide increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Consider reducing dose when used concomitantly with lomitapide.

• lonafarnib

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of lonafarnib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration of lonafarnib (a sensitive CYP3A substrate) with weak CYP3A inhibitors is unavoidable, reduce to, or continue lonafarnib at starting dose. Closely monitor for arrhythmias and events (eg, syncope, heart palpitations) since lonafarnib effect on QT interval is unknown.

• lumefantrine

  Monitor Closely (1)ciprofloxacin and lumefantrine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• macimorelin

  Serious - Use Alternative (1)macimorelin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Macimorelin causes an increase of ~11 msec in the corrected QT interval. Avoid coadministration with drugs that prolong QT interval, which could increase risk for developing torsade de pointes-type ventricular tachycardia. Allow sufficient washout time of drugs that are known to prolong the QT interval before administering macimorelin.

• magnesium chloride

  Monitor Closely (1)magnesium chloride decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium citrate

  Monitor Closely (1)magnesium citrate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium hydroxide

  Monitor Closely (1)magnesium hydroxide decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium oxide

  Monitor Closely (1)magnesium oxide decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Separate by 2 hours.

• magnesium sulfate

  Monitor Closely (1)magnesium sulfate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium supplement

  Monitor Closely (1)magnesium supplement will decrease the level or effect of ciprofloxacin by Other (see comment). Modify Therapy/Monitor Closely. Formation of an insoluble complex reduces absorption of the drug through intestinal tract; administer magnesium 2hr before the quinolone or 6hr after the quinolone

• meclofenamate

  Monitor Closely (1)meclofenamate, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• mefenamic acid

  Monitor Closely (1)mefenamic acid, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• mefloquine

  Monitor Closely (1)ciprofloxacin and mefloquine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.Serious - Use Alternative (1)mefloquine increases toxicity of ciprofloxacin by QTc interval. Avoid or Use Alternate Drug. Mefloquine may enhance the QTc prolonging effect of high risk QTc prolonging agents.

• melatonin

  Monitor Closely (1)ciprofloxacin will increase the level or effect of melatonin by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Monitor melatonin effects if coadministered with moderate CYP1A2 inhibitors

• meloxicam

  Monitor Closely (1)meloxicam, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• mestranol

  Monitor Closely (1)ciprofloxacin will decrease the level or effect of mestranol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• metformin

  Monitor Closely (1)ciprofloxacin increases effects of metformin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• methadone

  Monitor Closely (1)ciprofloxacin and methadone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• methotrexate

  Monitor Closely (1)ciprofloxacin will increase the level or effect of methotrexate by Other (see comment). Use Caution/Monitor. Renal tubular transport of methotrexate may be inhibited by coadministration of ciprofloxacin, potentially leading to increased methotrexate plasma levels and toxicity.

• methyl aminolevulinate

  Serious - Use Alternative (1)ciprofloxacin, methyl aminolevulinate. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Each drug may increase the photosensitizing effect of the other.

• methylprednisolone

  Monitor Closely (1)methylprednisolone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• metoprolol

  Minor (1)ciprofloxacin increases levels of metoprolol by decreasing metabolism. Minor/Significance Unknown. Ciprofloxacin may increase metoprolol plasma concentrations however mechanism is unknown. Further clinical evidence is needed but it may be appropriate to monitor patients during concomitant therapy with ciprofloxacin.

• mexiletine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of mexiletine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Mexiletine concentrations may be elevated and may produce an increase in therapeutic and adverse reactions.

• microbiota oral

  Serious - Use Alternative (1)ciprofloxacin decreases effects of microbiota oral by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Microbiota oral contains bacterial spores. Antibacterial agents may decrease efficacy if coadministered. Complete antibiotic regimens 2-4 days before initiating microbiota oral. .

• midazolam

  Minor (1)ciprofloxacin increases levels of midazolam by decreasing metabolism. Minor/Significance Unknown.

• midazolam intranasal

  Monitor Closely (1)ciprofloxacin will increase the level or effect of midazolam intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration of mild CYP3A4 inhibitors with midazolam intranasal may cause higher midazolam systemic exposure, which may prolong sedation.

• mifepristone

  Monitor Closely (1)ciprofloxacin will increase the level or effect of mifepristone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Use alternatives if available.

• miglitol

  Monitor Closely (1)ciprofloxacin increases effects of miglitol by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• mirtazapine

  Serious - Use Alternative (1)mirtazapine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• mobocertinib

  Serious - Use Alternative (1)mobocertinib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. If coadministration unavoidable, reduce mobocertinib dose and monitor QTc interval more frequently.

• mometasone inhaled

  Monitor Closely (1)mometasone inhaled and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• moxifloxacin

  Monitor Closely (1)ciprofloxacin and moxifloxacin both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• nabumetone

  Monitor Closely (1)nabumetone, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• nadolol

  Minor (1)ciprofloxacin increases levels of nadolol by decreasing metabolism. Minor/Significance Unknown.

• naproxen

  Monitor Closely (1)naproxen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• nateglinide

  Monitor Closely (1)ciprofloxacin increases effects of nateglinide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• nebivolol

  Minor (1)ciprofloxacin increases levels of nebivolol by decreasing metabolism. Minor/Significance Unknown.

• nilotinib

  Monitor Closely (1)ciprofloxacin and nilotinib both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• olanzapine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of olanzapine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Olanzapine plasma concentrations may be elevated, increasing the risk of adverse reactions such as orthostatic hypotension or sedation. It is important to use caution and observe patient and adjust the olanzapine dosage as needed.Serious - Use Alternative (1)olanzapine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• olaparib

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of olaparib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration with moderate CYP3A inhibitors cannot be avoided, reduce olaparib dose to 200 mg (capsule) or 150 mg (tablet) PO BID. Do not substitute tablets with capsules.

• olodaterol inhaled

  Monitor Closely (1)ciprofloxacin and olodaterol inhaled both increase QTc interval. Use Caution/Monitor. Drugs that prolong the QTc interval and may potentiate the effects of beta2 agonists on the cardiovascular system; increased risk of ventricular arrhythmias

• omeprazole

  Monitor Closely (1)omeprazole will decrease the level or effect of ciprofloxacin by unknown mechanism. Use Caution/Monitor. Absorption of the ciprofloxacin ER tablet was slightly diminished (20%) when coadministered with omeprazole.

• ondansetron

  Serious - Use Alternative (1)ciprofloxacin and ondansetron both increase QTc interval. Avoid or Use Alternate Drug. Avoid with congenital long QT syndrome; ECG monitoring recommended with concomitant medications that prolong QT interval, electrolyte abnormalities, CHF, or bradyarrhythmias.

• osilodrostat

  Monitor Closely (1)osilodrostat and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• osimertinib

  Monitor Closely (1)osimertinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor. Conduct periodic monitoring with ECGs and electrolytes in patients taking drugs known to prolong the QTc interval.

• oxaliplatin

  Monitor Closely (1)oxaliplatin will increase the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Monitor for ECG changes if therapy is initiated in patients with drugs known to prolong QT interval.Serious - Use Alternative (1)oxaliplatin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• oxaprozin

  Monitor Closely (1)oxaprozin, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• ozanimod

  Monitor Closely (1)ozanimod and ciprofloxacin both increase QTc interval. Modify Therapy/Monitor Closely. The potential additive effects on heart rate, treatment with ozanimod should generally not be initiated in patients who are concurrently treated with QT prolonging drugs with known arrhythmogenic properties.

• paliperidone

  Monitor Closely (1)ciprofloxacin and paliperidone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• panobinostat

  Serious - Use Alternative (1)ciprofloxacin and panobinostat both increase QTc interval. Avoid or Use Alternate Drug. Panobinostat is known to significantly prolong QT interval. Panobinostat prescribing information states use with drugs known to prolong QTc is not recommended.

• pasireotide

  Monitor Closely (1)ciprofloxacin and pasireotide both increase QTc interval. Modify Therapy/Monitor Closely.

• patiromer

  Monitor Closely (1)patiromer will decrease the level or effect of ciprofloxacin by drug binding in GI tract. Modify Therapy/Monitor Closely. Separate administration by at least 3 hr from patiromer

• penbutolol

  Minor (1)ciprofloxacin increases levels of penbutolol by decreasing metabolism. Minor/Significance Unknown.

• pentamidine

  Monitor Closely (1)ciprofloxacin and pentamidine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• pentoxifylline

  Monitor Closely (1)ciprofloxacin will increase the level or effect of pentoxifylline by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• phenytoin

  Monitor Closely (1)ciprofloxacin decreases effects of phenytoin by unknown mechanism. Use Caution/Monitor. Ciprofloxacin has been reported to both increase and decrease phenytoin concentrations. Additional clinical evidence is needed however; phenytoin serum concentrations should be monitored in patients.

• pimozide

  Monitor Closely (1)ciprofloxacin and pimozide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• pindolol

  Minor (1)ciprofloxacin increases levels of pindolol by decreasing metabolism. Minor/Significance Unknown.

• pioglitazone

  Monitor Closely (1)ciprofloxacin increases effects of pioglitazone by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• pirfenidone

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of pirfenidone by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Use of strong CYP1A2 inhibitors should be discontinued before initiating pirfenidone and avoided during treatment; if strong CYP1A2 inhibitors are the only drug of choice, dosage reductions are recommended

• piroxicam

  Monitor Closely (1)piroxicam, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• pitolisant

  Serious - Use Alternative (1)ciprofloxacin and pitolisant both increase QTc interval. Avoid or Use Alternate Drug.

• polysaccharide iron

  Monitor Closely (1)polysaccharide iron decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• pomalidomide

  Serious - Use Alternative (1)ciprofloxacin increases levels of pomalidomide by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug.

• ponatinib

  Monitor Closely (1)ponatinib increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• prednisolone

  Monitor Closely (1)prednisolone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• prednisone

  Monitor Closely (1)prednisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• pretomanid

  Monitor Closely (1)pretomanid will increase the level or effect of ciprofloxacin by Other (see comment). Modify Therapy/Monitor Closely. In vitro studies demonstrated that pretomanid significantly inhibits OAT3; monitor for increased adverse effects and consider dosage reduction for OAT3 substrates.

• primaquine

  Monitor Closely (1)primaquine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• probenecid

  Monitor Closely (1)probenecid will increase the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Probenecid interferes with renal tubular secretion of ciprofloxacin and produces an increase in the ciprofloxacin levels in the serum

• procainamide

  Monitor Closely (1)ciprofloxacin and procainamide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• propranolol

  Minor (1)ciprofloxacin increases levels of propranolol by decreasing metabolism. Minor/Significance Unknown.

• pyridoxine

  Minor (1)ciprofloxacin will decrease the level or effect of pyridoxine by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• quazepam

  Minor (1)ciprofloxacin increases levels of quazepam by decreasing metabolism. Minor/Significance Unknown.

• quercetin

  Minor (1)quercetin decreases effects of ciprofloxacin by pharmacodynamic antagonism. Minor/Significance Unknown.

• quetiapine

  Monitor Closely (1)quetiapine, ciprofloxacin. Either increases toxicity of the other by QTc interval. Use Caution/Monitor. Avoid use with drugs that prolong QT and in patients with risk factors for prolonged QT interval. Postmarketing cases show QT prolongation with overdose in patients with concomitant illness or with drugs known to cause electrolyte imbalance or prolong QT.

• quinapril

  Monitor Closely (1)quinapril will decrease the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Separate doses of quinapril and oral quinolones by 2 hr; interaction likely due to chelation

• quinidine

  Monitor Closely (1)ciprofloxacin and quinidine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• quinine

  Monitor Closely (1)ciprofloxacin and quinine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• quizartinib

  Monitor Closely (1)quizartinib, ciprofloxacin. Either increases effects of the other by QTc interval. Modify Therapy/Monitor Closely. Monitor patients more frequently with ECG if coadministered with QT prolonging drugs.

• ramelteon

  Monitor Closely (1)ciprofloxacin will increase the level or effect of ramelteon by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Ciprofloxacin may decrease the metabolism of ramelteon; if ciprofloxacin is coadministered with ramelteon, monitor the patient closely for toxicity.

• ranolazine

  Monitor Closely (1)ciprofloxacin and ranolazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• rasagiline

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of rasagiline by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Ciprofloxacin may increase rasagiline concentration resulting in increased adverse reactions. Patients should be closely monitored during concomitant use of these drugs.

• repaglinide

  Monitor Closely (1)ciprofloxacin increases effects of repaglinide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• ribociclib

  Serious - Use Alternative (1)ribociclib increases toxicity of ciprofloxacin by QTc interval. Avoid or Use Alternate Drug.

• rilpivirine

  Monitor Closely (1)rilpivirine increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Rilpivirine should be used with caution when co-administered with a drug with a known risk of Torsades de Pointes.

• riluzole

  Monitor Closely (1)ciprofloxacin will increase the level or effect of riluzole by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• ropinirole

  Monitor Closely (1)ciprofloxacin will increase the level or effect of ropinirole by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Ciprofloxacin may decrease the metabolism of ropinirole; monitor for increased effects of ropinirole.

• ropivacaine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of ropivacaine by Mechanism: decreasing metabolism. Use Caution/Monitor. Monitor for increased ropivacaine toxicity.

• rosiglitazone

  Monitor Closely (1)ciprofloxacin increases effects of rosiglitazone by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• ruxolitinib

  Minor (1)ciprofloxacin will increase the level or effect of ruxolitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• ruxolitinib topical

  Minor (1)ciprofloxacin will increase the level or effect of ruxolitinib topical by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• saquinavir

  Monitor Closely (1)ciprofloxacin and saquinavir both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.Serious - Use Alternative (1)saquinavir increases levels of ciprofloxacin by pharmacodynamic synergism. Avoid or Use Alternate Drug. Potential for increased toxicity. Increased risk of QT prolongation and cardiac arrhythmias.

• sarecycline

  Monitor Closely (1)sarecycline will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor for toxicities of P-gp substrates that may require dosage reduction when coadministered with P-gp inhibitors.

• saxagliptin

  Monitor Closely (1)ciprofloxacin increases effects of saxagliptin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• selinexor

  Serious - Use Alternative (1)selinexor, ciprofloxacin. unspecified interaction mechanism. Avoid or Use Alternate Drug. Patients treated with selinexor may experience neurological toxicities. Avoid taking selinexor with other medications that may cause dizziness or confusion.

• selpercatinib

  Monitor Closely (1)selpercatinib increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor.

• sertraline

  Monitor Closely (1)sertraline and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• sevelamer

  Monitor Closely (1)sevelamer decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Administer oral quinolones at least 1 hour before or 3 hours after sevelamer. .

• sevoflurane

  Serious - Use Alternative (1)sevoflurane and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• siponimod

  Serious - Use Alternative (1)siponimod and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• sitagliptin

  Monitor Closely (1)ciprofloxacin increases effects of sitagliptin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• sodium bicarbonate

  Monitor Closely (1)sodium bicarbonate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. A large proportion of ciprofloxacin is normally excreted unchanged in the urine. When urinary alkalinizing agents such as sodium bicarbonate are used concomitantly, the solubility of ciprofloxacin can be decreased because of alkaline urine. Patients should be monitored for crystalluria and nephrotoxicity.

• sodium citrate/citric acid

  Monitor Closely (1)sodium citrate/citric acid decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. A large proportion of ciprofloxacin is normally excreted unchanged in the urine. When urinary alkalinizing agents such as sodium citrate are used concomitantly, the solubility of ciprofloxacin can be decreased because of alkaline urine. Patients should be monitored for crystalluria and nephrotoxicity.

• sodium picosulfate/magnesium oxide/anhydrous citric acid

  Monitor Closely (2)ciprofloxacin decreases effects of sodium picosulfate/magnesium oxide/anhydrous citric acid by altering metabolism. Use Caution/Monitor. Coadministration with antibiotics decreases efficacy by altering colonic bacterial flora needed to convert sodium picosulfate to active drug.
  
  sodium picosulfate/magnesium oxide/anhydrous citric acid decreases levels of ciprofloxacin by cation binding in GI tract. Use Caution/Monitor. Take at least 2 hours before and not less than 6 hours after administration of sodium picosulfate, magnesium oxide and anhydrous citric acid to avoid magnesium chelation.

• sodium sulfate/?magnesium sulfate/potassium chloride

  Monitor Closely (1)sodium sulfate/?magnesium sulfate/potassium chloride decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Modify Therapy/Monitor Closely. Administer fluoroquinolones at least 2 hr before and no less than 6 hr after each dose to avoid chelation with magnesium. .

• sodium sulfate/potassium sulfate/magnesium sulfate

  Monitor Closely (1)sodium sulfate/potassium sulfate/magnesium sulfate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Modify Therapy/Monitor Closely. Administer fluoroquinolones at least 2 hr before and no less than 6 hr after each dose to avoid chelation with magnesium. .

• solifenacin

  Monitor Closely (1)solifenacin and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• sorafenib

  Monitor Closely (1)sorafenib and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• sotalol

  Monitor Closely (1)ciprofloxacin and sotalol both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• sotorasib

  Serious - Use Alternative (1)sotorasib will decrease the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If use is unavoidable, refer to the prescribing information of the P-gp substrate for dosage modifications.

• stiripentol

  Monitor Closely (1)stiripentol will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Consider reducing the dose of P-glycoprotein (P-gp) substrates, if adverse reactions are experienced when administered concomitantly with stiripentol.

• sucralfate

  Monitor Closely (1)sucralfate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. The oral absorption of ciprofloxacin may be significantly reduced by sucralfate secondary to chelation within the GI tract. To help avoid interactions due to chelation, ciprofloxacin should be taken 2 hours before or 6 hours after administration of sucralfate.

• sulindac

  Monitor Closely (1)sulindac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• sunitinib

  Monitor Closely (1)ciprofloxacin and sunitinib both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• tacrolimus

  Monitor Closely (1)tacrolimus and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• tasimelteon

  Monitor Closely (1)ciprofloxacin will increase the level or effect of tasimelteon by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Avoid coadministration; potentially large increase in tasimelteon exposure and greater risk of adverse reactions with strong CYP1A2 inhibitors

• telavancin

  Monitor Closely (1)ciprofloxacin and telavancin both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• temazepam

  Minor (1)ciprofloxacin increases levels of temazepam by decreasing metabolism. Minor/Significance Unknown.

• tepotinib

  Serious - Use Alternative (1)tepotinib will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If concomitant use unavoidable, reduce the P-gp substrate dosage if recommended in its approved product labeling.

• terbinafine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of terbinafine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• tetrabenazine

  Monitor Closely (1)ciprofloxacin and tetrabenazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• theophylline

  Serious - Use Alternative (2)ciprofloxacin will increase the level or effect of theophylline by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Concomitant use of theophylline and ciprofloxacin has decreased theophylline clearance and increased plasma levels and symptoms of toxicity. Serious and fatal reactions have included cardiac arrest, seizure, status epilepticus, and respiratory failure. If concomitant use cannot be avoided, monitor theophylline levels and adjust dosage as needed.
  
  ciprofloxacin will increase the level or effect of theophylline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Concomitant use of theophylline and ciprofloxacin has decreased theophylline clearance and increased plasma levels and symptoms of toxicity. Serious and fatal reactions have included cardiac arrest, seizure, status epilepticus, and respiratory failure. If concomitant use cannot be avoided, monitor theophylline levels and adjust dosage as needed.

• thiamine

  Minor (1)ciprofloxacin will decrease the level or effect of thiamine by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• thioridazine

  Monitor Closely (1)ciprofloxacin and thioridazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• timolol

  Minor (1)ciprofloxacin increases levels of timolol by decreasing metabolism. Minor/Significance Unknown. May also rarely decrease beta blocker levels.

• tinidazole

  Monitor Closely (1)ciprofloxacin will increase the level or effect of tinidazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• tizanidine

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of tizanidine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Coadministration of ciprofloxacin and tizanidine is contraindicated.

• tobramycin inhaled

  Monitor Closely (1)tobramycin inhaled and ciprofloxacin both increase nephrotoxicity and/or ototoxicity. Modify Therapy/Monitor Closely. Avoid concurrent or sequential use to decrease risk for ototoxicity

• tolazamide

  Monitor Closely (1)ciprofloxacin increases effects of tolazamide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• tolbutamide

  Monitor Closely (1)ciprofloxacin increases effects of tolbutamide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• tolmetin

  Monitor Closely (1)tolmetin, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• toremifene

  Serious - Use Alternative (1)ciprofloxacin and toremifene both increase QTc interval. Avoid or Use Alternate Drug. Concurrent use of toremifene with agents causing QT prolongation should be avoided. If concomitant use is required it's recommended that toremifene be interrupted. If interruption not possible, patients requiring therapy with a drug that prolongs QT should be closely monitored. ECGs should be obtained for high risk patients.

• tretinoin

  Serious - Use Alternative (1)ciprofloxacin, tretinoin. Mechanism: pharmacodynamic synergism. Avoid or Use Alternate Drug. Both drugs have increased risk of phototoxicity, use caution with concomitant use.

• tretinoin topical

  Serious - Use Alternative (1)ciprofloxacin, tretinoin topical. Mechanism: pharmacodynamic synergism. Avoid or Use Alternate Drug. Both drugs have increased risk of phototoxicity, use caution with concomitant use.

• triamcinolone acetonide injectable suspension

  Monitor Closely (1)triamcinolone acetonide injectable suspension and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• triazolam

  Minor (1)ciprofloxacin increases levels of triazolam by decreasing metabolism. Minor/Significance Unknown.

• trilaciclib

  Serious - Use Alternative (1)trilaciclib will decrease the level or effect of ciprofloxacin by Other (see comment). Avoid or Use Alternate Drug. Avoid coadministration of trilaciclib (OCT2, MATE1, and MATE-2K inhibitor) with substrates where minimal increased concentration in kidney or blood may lead to serious or life-threatening toxicities.

• trimagnesium citrate anhydrous

  Monitor Closely (1)trimagnesium citrate anhydrous decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Multivalent cation-containing products may reduce bioavailability of quinolones; administer quinolone at least 2 hr before or 6 hr after magnesium; use alternatives if available.

• triptorelin

  Monitor Closely (1)triptorelin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• tucatinib

  Monitor Closely (1)tucatinib will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Consider reducing the dosage of P-gp substrates, where minimal concentration changes may lead to serious or life-threatening toxicities.

• typhoid vaccine live

  Serious - Use Alternative (1)ciprofloxacin decreases effects of typhoid vaccine live by pharmacodynamic antagonism. Contraindicated. Antibiotics may diminish the therapeutic effects of Typhoid Vaccine. Wait until Abx Tx complete to administer live bacterial vaccine.

• umeclidinium bromide/vilanterol inhaled

  Serious - Use Alternative (1)ciprofloxacin increases toxicity of umeclidinium bromide/vilanterol inhaled by QTc interval. Avoid or Use Alternate Drug. Exercise extreme caution when vilanterol coadministered with drugs that prolong QTc interval; adrenergic agonist effects on the cardiovascular system may be potentiated.

• vadadustat

  Monitor Closely (1)vadadustat will increase the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Vadadustat may increase exposure of OAT3 substrates. Monitor for signs of adverse effect of OAT3 substrate and reduce substrate dose in accordance with their product labeling.

• valbenazine

  Monitor Closely (1)valbenazine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• vandetanib

  Serious - Use Alternative (1)ciprofloxacin, vandetanib. Either increases toxicity of the other by QTc interval. Avoid or Use Alternate Drug. Avoid coadministration with drugs known to prolong QT interval; if a drug known to prolong QT interval must be used, more frequent ECG monitoring is recommended.

• vemurafenib

  Serious - Use Alternative (1)vemurafenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Concomitant use of vemurafenib with drugs that prolong QT interval is not recommended.

• venetoclax

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of venetoclax by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If a moderate CYP3A inhibitor must be used, reduce the venetoclax dose by at least 50%. Monitor more closely for signs of venetoclax toxicities.

• vilanterol/fluticasone furoate inhaled

  Serious - Use Alternative (1)ciprofloxacin increases toxicity of vilanterol/fluticasone furoate inhaled by QTc interval. Avoid or Use Alternate Drug. Exercise extreme caution when vilanterol coadministered with drugs that prolong QTc interval; adrenergic agonist effects on the cardiovascular system may be potentiated.

• vildagliptin

  Monitor Closely (1)ciprofloxacin increases effects of vildagliptin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• vitamin K1 (phytonadione)

  Minor (1)ciprofloxacin will decrease the level or effect of vitamin K1 (phytonadione) by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• voclosporin

  Monitor Closely (1)voclosporin, ciprofloxacin. Either increases effects of the other by QTc interval. Use Caution/Monitor.

• vorinostat

  Monitor Closely (1)vorinostat and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• warfarin

  Monitor Closely (1)ciprofloxacin increases effects of warfarin by unspecified interaction mechanism. Use Caution/Monitor.

• zinc

  Monitor Closely (1)zinc will decrease the level or effect of ciprofloxacin by cation binding in GI tract. Modify Therapy/Monitor Closely. Ciprofloxacin should be administered 2 hr before or 6 hr after zinc salts.

• ziprasidone

  Monitor Closely (1)ciprofloxacin and ziprasidone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• zolpidem

  Monitor Closely (2)ciprofloxacin will increase the level or effect of zolpidem by affecting hepatic enzyme CYP1A2 metabolism. Modify Therapy/Monitor Closely.
  
  ciprofloxacin will increase the level or effect of zolpidem by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely.