Metformin can reduce the weight of patients but can not be used for weight loss, metformin is a more widely used clinical hypoglycemic drugs, mainly used for diet and exercise control of blood sugar is not effective in patients with high blood sugar. Metformin can stop the intestinal absorption of glucose, but also can reduce the triglyceride content in the body, metformin can reduce weight, diabetic patients should take the drug in accordance with medical advice, but can not be used purely for weight loss, the use of too much is easy to cause side effects on the body itself, such as dizziness, blurred vision, panic, weakness, etc. Metformin has a relatively large impact on the kidneys, the human gastrointestinal tract will also produce side effects, easily lead to loss of appetite, vomiting, diarrhea symptoms, not timely adjustment can easily lead to lactic acidosis, resulting in hyperventilation, impaired consciousness, metformin can not be used for weight loss.