Abstract
Xanthine oxidase (XO) system includes the most important enzymes involved in ROS production and it is also involved in Uric acid synthesis. Allopurinol is one of the most useful drugs in Hyperuricemia. This drug inhibits XO system, reducing plasmatic uric acid. However, Allopurinol is also useful as an oxidative stress inhibitor, even in the average plasmatic concentration of uric acid in…