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Update on rifampin drug interactions. II
S M Borcherding1, A M Baciewicz, T H Self
1Department of Pharmacy Services, University Hospitals of Cleveland, Ohio.
Archives of Internal Medicine
|April 1, 1992
Summary
Rifampin significantly interacts with many medications by inducing liver enzymes. Careful management is crucial to prevent treatment failure or toxicity when starting or stopping rifampin.
Area of Science:
- Pharmacology
- Drug Metabolism
- Drug Interactions
Background:
- Rifampin is a potent inducer of hepatic cytochrome P450 (CYP450) oxidative enzymes.
- Clinically significant drug interactions involving rifampin are well-documented with various medications.
Purpose of the Study:
- To review and update the understanding of rifampin-associated drug interactions.
- To highlight newly identified and previously reported interactions requiring clinical attention.
Main Methods:
- Literature review of published studies on rifampin drug interactions.
- Analysis of clinical significance and management strategies for identified interactions.
Main Results:
- Rifampin interacts with numerous drugs, including oral anticoagulants, contraceptives, cyclosporine, and antifungals like ketoconazole and fluconazole.
- New interactions reported for haloperidol, antiarrhythmics, diltiazem, and benzodiazepines.
- Ongoing research confirms interactions with glucocorticoids, cyclosporine, verapamil, and oral anticoagulants.
Conclusions:
- Effective management of rifampin drug interactions is essential to prevent therapeutic failure and toxicity.
- Continuous monitoring and research are necessary as new rifampin interactions are expected to be identified.