The active component of this medicine is Orlistat which works by inhibiting the enzyme pancreatic lipase. This enzyme is responsible for the conversion of the triglycerides into the fatty acids. Generic Xenical inhibits/blocks the production of the enzyme pancreatic lipase in the body. Thus, blocking the conversion of triglycerides to fatty acids. These undigested triglycerides are of no use to the body and are eliminated by the body in the stools.
Generic Xenical does not affect the appetite or the eating habits of a person. In simple words, generic Orlistat does not allow the consumed food to get converted into proteins, carbohydrates, and fats. This is how generic Xenical helps in weight loss.