Cardizem SR Diltiazem Hydrochloride Carbamazepine
MajorDiltiazem inhibits carbamazepine metabolism and can cause toxicity. Carbamazepine may lower diltiazem levels.
These medicines can affect each other in a serious way. Do not start taking them together unless your doctor has said it is OK. If you already take both, do not stop either one on your own: speak to your doctor or pharmacist soon.
Clinical management: Avoid if possible. Otherwise monitor carbamazepine levels and reduce the dose.