WXenical (Orlistat) is a highly trusted medication used for weight management along with a low-calorie diet. It prevents some of the consumed fats from absorption into the body. Used by medical specialists around the world to treat patients with obesity, Xenical has become a new phenomenon in the weight loss area. Also marketed as Alli, Orlipastat, Orlipastatum and Orlistat. Xenical registered trademark is the property of Roche Laboratories.