action of the allopurinol.. ttt of uric acid and ca oxalate renal stone action of the allopurinol?? Mechanism of action is xanthin oxidase inh used for: 1) prophylaxis of gout 2) ttt of uric acid and ca oxalate renal stone. Share This: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook