Palcigen Palbociclib Ritonavir
MajorRitonavir is a strong CYP3A inhibitor, so it slows down the liver enzyme that breaks down Palbociclib. This can cause more Palbociclib to build up in the body. Because of this, the leaflet advises you to avoid taking Palbociclib and Ritonavir together.
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.