Hypoglycemic drugs, mainly used for patients with type II diabetes, are suitable for people whose blood sugar is still high through diet control and exercise treatment, and are also suitable for obese diabetic patients. They can not only control blood sugar, but also lose weight, but they are not desirable if abused.

First of all, the pharmacological action of metformin is to reduce liver sugar output and increase glycogen synthesis, but the weight loss effect is not so obvious, so it can not be regarded as a weight loss drug.

Secondly, although the incidence of adverse reactions of metformin is very low, the most serious adverse reaction of metformin is lactic acidosis. Mild lactic acidosis can cause fatigue, nausea, loss of appetite and other symptoms. In severe cases, there will be disturbance of consciousness, weakened limb reflexes and life-threatening shock. The most severe patients may need dialysis to save their lives.