Sutinat 50 Capsule is used in the treatment of kidney cancer and gastrointestinal stromal This medication is used to treat certain types of cancer (kidney, pancreas, and intestinal). It is also used to treat people who are at high risk of the kidney cancer coming back again after having kidney surgery. Sunitinib works by stopping or slowing the growth of cancer tumors. It also works by slowing the growth of new blood vessels within the tumor.