Complex sentence: In humans, inhibition of xanthine oxidase reduces the production of uric acid, and several medications that inhibit xanthine oxidase are indicated for treatment of hyperuricemia and related medical conditions including gout.
Split into simpler sentences: In humans, inhibition of xanthine oxidase reduces the production of uric acid. Therefore, a xanthine oxidase inhibitor may be used to treat hyperuricemia and related medical conditions including gout.