The only medicines in the UK specifically licensed for the treatment of obesity are called orlistat and sibutramine. Orlistat works by reducing the absorption of the fat you eat. Sibutramine increases the feeling of fullness when you eat by boosting levels of the chemical, serotonin, which is naturally made in your body.
Both these drugs have been clinically proven to help people lose weight. They are only prescribed if you are obese or your weight is causing you health problems. You will also have to show that you have seriously attempted to lose weight by diet, exercise etc.
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