Related Experiment Videos
Clarithromycin-carbamazepine interaction in a clinical setting
1Department of Public Welfare, Ebensburg Center, PA 15931.
The Journal of the American Board of Family Practice
|November 1, 1994
Summary
Clarithromycin significantly increases carbamazepine levels, even with dosage reduction, posing a risk of toxicity. Avoid this combination if possible, or monitor levels closely.
Area of Science:
- Pharmacology
- Clinical Pharmacy
- Drug Interactions
Background:
- Investigated the use of clarithromycin in developmentally disabled men with seizure disorders on carbamazepine.
- Focused on potential drug interactions between these two medications.
Purpose of the Study:
- To retrospectively analyze the impact of clarithromycin on carbamazepine serum levels.
- To assess the safety and efficacy of co-administering these drugs.
Main Methods:
- Retrospective study of 5 patients on carbamazepine who received clarithromycin.
- Carbamazepine dosage was reduced, and serum levels were monitored.
- Compared serum levels during clarithromycin treatment with baseline and post-treatment levels.
Main Results:
- Carbamazepine serum levels increased in all patients despite a 30-40% dosage reduction.
- Three patients developed toxic serum levels of carbamazepine.
- Indicates a significant drug interaction between clarithromycin and carbamazepine.
Conclusions:
- A serious drug interaction exists between carbamazepine and clarithromycin.
- Clarithromycin should be avoided in patients taking carbamazepine if feasible.
- If clarithromycin is necessary, reduce carbamazepine dosage (30-50%), monitor levels, and watch for toxicity symptoms.