It is a prescription drug that works in the presence of dietary fat in body. It considerably helps overweight people to lose their extra pounds to normal. It only works with better results when taken with a well balanced diet that is rich in fruit and vegetables and low in fats. This medication stops the body from digesting some of the fat you eat and thus allow to decrease the amount of fat that piles up in the body with keeping your appetite constant. It is a perfect pill for dieters to lose weight by helping the body to reduce the intake of excessive fats.