Gevalt is a metformin hydrochloride tablet with hypoglycemic effect. Its effects include: 1. It is suitable for type 2 diabetes mellitus that cannot be effectively controlled by diet and physical activity alone, especially for obese type 2 diabetes mellitus patients. 2. It can be combined with insulin for both type 1 and type 2 diabetes mellitus, which can increase the hypoglycemic effect of insulin, reduce insulin dosage and prevent the occurrence of hypoglycemia. 3. Gevalt can be combined with sulfonylurea oral hypoglycemic drugs, which has a synergistic effect. The dose is 0.5g once, taken in small doses at first, and the dose is gradually adjusted as the patient’s blood sugar increases, with the maximum recommended dose not exceeding 2550mg/d. The adverse effects of this drug are mainly symptoms such as bloating, diarrhea and indigestion.