Nexavar (generic: sorafenib) is a prescription medication used to treat adults with certain types of liver and kidney cancers. Nexavar belongs to a group of drugs called kinase inhibitors, which by blocking proteins called kinases which are needed for cell growth.

This medication comes in tablet form and is taken twice a day, without food.

Common side effects of Nexavar include rash or itching of the skin, hair thinning, diarrhea, and weight loss.