Erlotin Erlotinib Carbamazepine
MajorCarbamazepine induces CYP3A4 and reduces erlotinib exposure.
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.
What to do: Avoid if possible, or consider increasing the erlotinib dose with monitoring.