Xenical (orlistat) blocks some of the fat that you eat, keeping it from being absorbed by your body.
Xenical is used to aid in weight loss, or to help reduce the risk of regaining weight already lost. This medicine must be used together with a reduced-calorie diet and is to used only by adults.
Xenical is the prescription-strength form of orlistat. The alli brand of orlistat is available without a prescription.