The Nevada State Athletic Commission has overturned Donald “Cowboy” Cerrone’s Sept. 5 victory over Kenneth Alexander after Cerrone tested positive for Hydrochlorothiazide.
Cerrone (7-0 1 NC) submitted Kenneth Alexander (5-3) with a triangle choke early in the first round of their lightweight bout at WEC 30. Following the fight, Cerrone failed his post-fight drug test after Hydrochlorothiazide was found in his system.
From Wikipedia: Hydrochlorothiazide belongs to the thiazide class of diuretics, acting on the kidneys to reduce sodium (Na) reabsorption in the distal convoluted tubule. This reduces the osmotic pressure in the kidneys, causing less water to be reabsorbed by the collecting ducts. This leads to increased urinary output.
UFC veteran Thiago Alves also tested positive for a diuretic following his victory over Tony DeSouza at UFC 66. The NSAC decided not to overturn the decision the result of Alves-DeSouza as they felt the drug played no part in Alves victory.