Methadone and Carbamazepine (Tegretol CR 400 mg): interaction and safety
This source-based reference is not a personal treatment recommendation. The relevance and management of an interaction depend on the exact products, route, dose and clinical situation.
Interaction mechanism
Induction of methadone metabolism may reduce exposure; withdrawal of the inducer can reverse the effect.
Clinical significance and safety
This enzyme-inducing medicine can reduce methadone exposure and trigger withdrawal or reduced effect; stopping it can subsequently increase methadone exposure and breathing risk. A prescriber or pharmacist should review the combination; do not independently stop, start or change either medicine.
Using this information
This is a source-based reference record, not a recommendation to combine, stop or change medicines. A missing interaction record does not establish safe use. A qualified healthcare professional should consider the exact products, doses, other medicines and individual health circumstances.