Telithromycin Crizotinib
MajorTelithromycin is a strong CYP3A inhibitor. That means it slows down the liver enzyme that breaks down crizotinib, so more crizotinib stays in your body than it should. Because of this, the two medicines should not be taken together. If you have been prescribed both, talk to your doctor or pharmacist before taking either one.
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.