If postprandial blood sugar is high, but fasting and postprandial blood sugar are not high, glycosidase inhibitors are preferred; If postprandial hyperglycemia is the main cause, accompanied by mild postprandial hyperglycemia, benzoic acid derivatives should be considered first; If fasting and postprandial blood glucose are high, sulfonylureas, biguanides or thiazolidinediones should be considered regardless of postprandial blood glucose.
Metformin: It can relieve insulin resistance, increase the intake and utilization of glucose by peripheral tissues, effectively reduce blood sugar, and also reduce body weight, blood pressure and blood lipid. Safe and cheap, and will not cause hypoglycemia when used alone. It is the first choice for overweight or obese diabetic patients. However, there are many gastrointestinal reactions, and those with heart failure and hypoxia and severe liver and renal insufficiency are contraindicated.