Western medicine for weight loss varies in composition, commonly used weight loss drugs are as follows: (1) food inhibitors: ① amphetamines: stimulant drugs, have a reduction in sleep, reduce the role of the appetite, long-term use of addictive, and can cause nervousness, insomnia, high blood pressure and other adverse symptoms.

②Biguanide hypoglycemic drugs: can suppress appetite, but easy to cause nausea, vomiting.

③Diethylaminopropiophenone: reduce appetite and achieve the effect of weight loss, with fewer side effects.

(2) energy-consuming agents: ① thyroid hormones: side effects, aggravate the heart load, and the risk of inducing hyperthyroidism.

②Ethylnitrophenol: side effects, can lead to shortness of breath, drowsiness, damage to the liver, kidneys and heart.

③ Growth hormone: easy to produce antibodies.

④Lipiodol: easy to produce edema, allergy.

(3) to prevent digestion and absorption of agents: ① neomycin, cholestyramine: to prevent the absorption of fat

② amylase inhibitors: can make the enzyme activity is reduced to reduce fat synthesis.

③ Swelling and filling agents: fake food therapy, no calories, indigestible things stay in the stomach, so that people do not have a sense of hunger, but it is easy to lead to diarrhea.

④Influence lipid metabolism drugs: hinder lipid metabolism, reduce the accumulation of adipose tissue.

⑤Inhibiting insulin secretion drugs: inhibit the excessive secretion of insulin, reduce sugar production and fat synthesis.

6 light laxatives, diuretics: increase excretion, reduce intestinal absorption of fat, discharge water, but this practice will cause the body to lose a lot of minerals and vitamins, there are side effects, is not conducive to good health.

7 Naloxone: make people lose appetite, is a psychotropic drug, the liver has a great harm.