Orlistat is able to prevent the gastrointestinal tract from absorbing fat from food, so Orlistat is best used at the same time as food during meals, or taken about one hour after meals, can effectively reduce the intestinal mucosa of the absorption of grease and fat from food, and can help to reduce weight. However, in the use of orlistat at the same time must pay attention to eat less greasy food, strengthen the exercise, a variety of factors at the same time to be able to effectively play the role of weight loss. And it should be noted that if the food does not contain fat, Orlistat can not be taken, and Orlistat should not be taken more than three times a day. Orlistat can only be considered for use in patients who are clearly overweight or obese, and it is not recommended for people of normal size and weight, and it is best not to use this drug in children and adolescents.