This capsule is used for the treatment of kidney cancer and gastrointestinal stromal tumor. Sunitinib 50mg capsule interferes with the protein that is responsible for the cell division of cancer cells. This leads to lower the growth of cancer cells in the body. One should take the dosage as advised by the doctor depending on your health condition. The common side effects associated with the medicine are weight loss, nausea, vomiting, and weakness.