Allopurinol

Allopurinol is used to treat gout, kidney stones, and tophi (uric acid deposits in tissues), which are caused by excessive levels of uric acid in the blood. It is also used to prevent elevated blood uric acid levels in patients undergoing cancer chemotherapy. Allopurinol works by reducing the production of uric acid in your body. This medicine may also be used to treat other conditions as determined by your doctor.