Drugs against obesity and diet pills help people lose weight faster and more effective than other methods of weight loss. Some of the diet pills for most popular today include Orlistat, sibutramine, metformin, Byette and Symlin. Medicines anti-obesity or pills against obesity, diet are defined as pharmacological treatments that are used to help a person lose weight. Normally, this type of pills are only recommended for people with weight problems which threaten the life and can only be purchased by someone who has a prescription. These weight loss agents work suppress a person’s appetite, increase your metabolism, and / or interfere with your body’s natural ability to absorb specific nutrients that are found in food. Many people are turning to drugs against obesity and diet pills when diet and exercise appears to be ineffective in any visible or sensitive outcome. Other people are turning to them if they are using up against time and who want to see rapid and immediate results. And others use them in accordance with the Council and recommendation of your trusted doctors and health professionals. Examples of known obesity drugs and diet pills available in the market these days are Orlistat, sibutramine, metformin Byetta and Symlin. Orlistat, more popularly known as the brand name Xenical, interferes with the natural process of the body to absorb fats, reducing and decreasing the amount of fat absorbed by the body. Originally, this type of obesity drug could only be purchased by those who have a doctor’s prescription. However since February 2007, its sale without a prescription was already approved. Sibutramine acts as a suppressant of appetite, eliminate or reduce the feeling of hunger and the desire to eat. Metformin is a specific drug used by people who are inflicted with diabetes. It was discovered that people with type 2 diabetes they used this medication had the side effect of weight loss.