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Related Experiment Videos

Update on quinolone drug interactions.

D Hulisz, K Miller

    American Pharmacy
    |September 1, 1990
    PubMed
    Summary
    This summary is machine-generated.

    To avoid reduced antibiotic effectiveness, separate administration of fluoroquinolones like ciprofloxacin and norfloxacin from sucralfate by at least two hours. Monitor theophylline levels closely when co-administering with ciprofloxacin due to potential toxicity.

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    Area of Science:

    • Pharmacology
    • Drug Interactions
    • Clinical Pharmacy

    Background:

    • Sucralfate administration can decrease the bioavailability of fluoroquinolone antibiotics, including ciprofloxacin and norfloxacin.
    • The clinical significance of this pharmacokinetic interaction on therapeutic outcomes remains largely uninvestigated.
    • Potential interactions between fluoroquinolones and other common gastrointestinal medications require clarification.

    Purpose of the Study:

    • To review the pharmacokinetic interactions between fluoroquinolones and common gastrointestinal medications.
    • To assess the clinical implications of these drug interactions.
    • To provide evidence-based recommendations for concurrent medication use.

    Main Methods:

    • Literature review of pharmacokinetic and clinical studies on fluoroquinolone interactions.

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  • Analysis of drug absorption, metabolism, and excretion data.
  • Evaluation of reported therapeutic outcomes and adverse events.

    • Main Results:

    • Concurrent administration of sucralfate with ciprofloxacin or norfloxacin significantly reduces quinolone bioavailability.
    • Magnesium- and aluminum-containing antacids may also impair fluoroquinolone absorption.
    • Calcium carbonate and H2 receptor antagonists show no significant interaction and can be alternatives.
    • Ciprofloxacin co-administration can increase theophylline levels, potentially causing toxicity; monitoring and dose adjustment are crucial.
    • Norfloxacin may cause minor increases in theophylline levels, likely not clinically significant.

    Conclusions:

    • Avoid concurrent administration of sucralfate with norfloxacin or ciprofloxacin; separate doses by at least two hours.
    • Consider calcium carbonate or H2 receptor antagonists as safer alternatives to sucralfate or aluminum/magnesium antacids.
    • Careful monitoring of theophylline levels and clinical signs of toxicity is essential when ciprofloxacin is used concurrently.
    • Theophylline clearance reduction after ciprofloxacin cessation may persist for up to five days.