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Related Experiment Videos

Cimetidine drug interactions.

W L Greene, T H Self, M J Levinson

    The Journal of Family Practice
    |June 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    Cimetidine, an antiulcer drug, significantly interacts with many medications by inhibiting liver enzymes. Close monitoring of drug effects and levels is crucial when cimetidine is used concurrently.

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    Area of Science:

    • Pharmacology
    • Drug Interactions
    • Hepatology

    Background:

    • Cimetidine is a common antiulcer medication.
    • It is a potent inhibitor of liver mixed-function oxidase enzymes.
    • This inhibition leads to significant drug interactions.

    Purpose of the Study:

    • To review and document the clinically significant drug interactions associated with cimetidine.
    • To highlight the mechanisms by which cimetidine affects other drugs.
    • To emphasize the importance of monitoring drug levels and effects during co-administration.

    Main Methods:

    • Review of existing clinical data and literature on cimetidine drug interactions.
    • Analysis of cimetidine's effects on drug metabolism, excretion, and absorption.

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  • Identification of specific drug classes affected by cimetidine.

    • Main Results:

    • Cimetidine alters the metabolism or excretion of warfarin, theophylline, phenytoin, lidocaine, beta-blockers, benzodiazepines, narcotic analgesics, and procainamide.
    • It can exacerbate myelosuppression from nitrosoureas and affect ketoconazole absorption.
    • Other mechanisms like increased gastric pH and altered liver blood flow also contribute to interactions.

    Conclusions:

    • Clinically significant drug interactions involving cimetidine are common and well-documented.
    • Healthcare providers should closely monitor patients receiving cimetidine with other medications.
    • Understanding these interactions is vital for patient safety and effective pharmacotherapy.