List of products in the National Drug Code with proprietary name . Febuxostat is used to lower uric acid levels in people with gout. Febuxostat works by reducing the amount of uric acid made by the body. An increased uric acid level can cause gout. Because of the risk of very serious heart-related problems and stroke with febuxostat (see also Warning section), febuxostat should be used only after treatment with a medication called allopurinol did not work to lower your uric acid level, caused serious side effects, or is not recommended by your doctor. Febuxostat should be used only if you have symptoms caused by a high blood uric acid level.