Alkriz Crizotinib Ritonavir
MajorCrizotinib and ritonavir should not be taken together. Ritonavir is one of the strong CYP3A inhibitors, a group of medicines that the crizotinib leaflet says to avoid using alongside it. If you take either medicine and have been prescribed the other, talk to your doctor or pharmacist before you take the next dose.
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.