The most common principle of diet pills is to suppress appetite, prevent absorption, increase excretion and improve metabolic level. In the next part, we will explain these main principles according to the different components of diet pills.

Second, the main ingredients of diet pills:

1, fenfluramine:

Fenfluramine was recognized by the US Food and Drug Administration (FDA) for its safety and effectiveness in the 1960s, and then it was widely used to treat obesity and other diseases. The finished drug is mainly used to treat simple obesity and obese patients with diabetes, hypertension, cardiovascular diseases and anxiety. It is a drug that acts on the central nervous system and helps users suppress their appetite.

Fenfluramine was stopped by National Medical Products Administration in 2009 1 month in view of the frequent cases of serious side effects of Fenfluramine.

2. Sibutramine;

Sibutramine entered the market in 1997 with the approval of FDA, and it is one of the most common ingredients of diet pills on the market at present. Of course, some illegal manufacturers illegally added it to health care products.

Sibutramine mainly reduces people's appetite through its influence on human endocrine, so as to reduce eating and lose weight. From the currently available materials, mainly including FDA instructions and manufacturer's instructions, we can know that sibutramine should be used in combination with low-calorie diet to lose weight and maintain weight, and it should be used for people with initial body mass index (BMI) of at least 30, or people with body mass index greater than or equal to 27 but with other risk factors (such as hypertension and diabetes).

Sibutramine can be used as an adjuvant treatment to control obesity. It should not be taken for more than one year, and the weight may gain again after stopping taking it. In addition,1people under 8 years old or over 65 years old are not recommended to take this medicine.

At present, the regular sibutramine drugs in China are all prescription drugs, and they all need prescriptions to be purchased according to regulations.

3. Orlistat:

1999 The FDA approved orlistat to be sold in the United States as a weight-loss prescription drug used in conjunction with a low-calorie diet. In 2007, its low-dose drug was approved by the FDA to be sold in the United States as an over-the-counter drug.

Orlis mainly inhibits the absorption of intestinal fat, thus achieving the purpose of reducing calorie and fat intake. However, it is precisely because the absorption of fat caused by taking orlistat is reduced, and the absorption of fat-soluble vitamins is also affected. Therefore, the FDA recommends taking multivitamins at the same time.