Sunitinib 50 mg capsule is an anti-cancer medicine that is primarily used to treat kidney cancer and gastrointestinal stromal tumor. It blocks the working of the tyrosine kinase protein that is responsible for the growth of cancer cells. Although the medicine is only given by doctors due to its benefits. But, sometimes you may experience some side effects as well such as abdominal pain, high blood pressure, fatigue, weight loss, rash, breathlessness, and so on.