What is Xenical? Xenical is a product that is mainly developed for people who are obese and want to bring their weight under control. It is a prescription medicine and those having a body mass index of 30 and above are eligible to use it. A low calorie diet help this product to work efficiently, without following this, it is very difficult to lose weight. It must be used under proper guidance of a physician as it can cause certain side effects that can lead to serious medical complications. It may cause kidney disease, lowers the body ability to absorb vitamins. It can also cause liver problems, gallbladder problems, frequent bowel movements, oily stools as well as discharge of oily rectal. So don’t forget to consult your doctor and take this medication exactly as directed by him. Other prescribed or non-prescribed medications that you are taking must be thoroughly checked by your doctor to minimize the risk. XENICAL is a weight loss product that is taken with a low calorie diet but ...