Xenical contains the active ingredient Orlistat, and is used in the treatment of obesity.
Xenical works by preventing one-third of the fat in your food you eat from being digested. The undigested fat is not absorbed and is passed out with your feces. This helps avoid gaining weight but does not cause you to lose weight, therefore it's important to stick to a diet and exercise plan.
The recommended dose of Xenical 120mg capsule is three times daily, it can be taken immediately before, during or up to one hour after each main meal. If you eat a fat-free meal you do not need to take Xenical, as there will be no fat to absorb.