Febuxostat is a xanthine oxidase inhibitor. It inhibits the production of uric acid. While allopurinol can only inhibit the reduced form of xanthine oxidase, febuxostat can inhibit both the reduced and oxidized forms of xanthine oxidase. Therefore, febuxostat's ability to lower uric acid is faster and stronger. 80% of blood uric acid is synthesized in the body, and only...
