Intake of alcohol is intolerable as it increases the tendency for the liver to become impaired. Incidents of death due to liver failure have also been reported. By applying amino acid replacement orally right after the surgery, prevention of these liver problems may be achieved. Due to the aforementioned complications, instead of performing the intestinal bypass surgery, gastric bypass surgery is a more commonly used bariatric surgery nowadays. Intestinal bypass surgery induces malabsorption by anastomosing proximal and distal small intestine. Yet, the small intestine has an important role in performing a wide range of important physiological and metabolic functions, such as the metabolism of lipids. Stomach, on the contrary, has a less significant role in the physiological and metabolic functions. The most prominent physiological function of the stomach is digestion, but the small intestine is also capable of digestion. Thus, gastric bypass surgery does less harm to the overall metabolism of nutrients. Gastric bypass leads to weight loss by controlling the appetite of the patients, instead of inducing malabsorption. As a result, the intestinal bypass is now replaced by an alternative of gastric bypass. Anti-obesity medications is also a possible solution. Examples of such medications include the Orlistat, which was first prescribed in 1998. In 2009, it became an over-the-counter drug after obtaining consent from the European Medicines Agency. In clinical trials, patients prescribed with Orlistat (120 mg) showed better weight loss than those without (8.76 kg vs 5.81 kg) in one year. With effective medications, the obese can better control their weight without the need of undergoing a relatively high-risk surgery.