Reductil is a drug that helps to reduce weight. This medicine consists of Sibutramine which increases the level of two chemicals in the brain called serotonin and noradrenaline, which in turn helps to reduce body weight. This medicine is a boon for those people who are obese. This medicine should be taken along with the diet as well as exercise for treating obesity. It works by regulating the appetite of a person. What happens is that Sibutramine increases the chemicals in the brain that cause a feeling of fullness, and hence the person eats in fewer amounts which ultimately helps in reducing the weight of the person.