Common medications for diabetes mellitus include biguanides, sulfonylureas, glinides, thiazolidinediones, and alpha-glucosidase inhibitors. 1. Metformin: the first-line drug for the treatment of type 2 diabetes mellitus, can be used alone or in combination with other drugs, mainly metformin. 2. Sulfonylureas: mild and moderate type 2 diabetes mellitus can be treated with this kind of drugs if the blood glucose control is still unsatisfactory after adopting diet and exercise treatments, and the commonly used drugs are glimepiride, gliclazide and so on. 3. Glargine: mainly used to control postprandial hyperglycemia, commonly used drugs include Naglinide, Repaglinide and so on. 4. Thiazolidinediones: for obese patients with type 2 diabetes mellitus with obvious insulin resistance, this product can be used alone or in combination with other hypoglycemic drugs, commonly used drugs are rosiglitazone, pioglitazone and so on. 5. α-glucosidase inhibitors: mainly used to control postprandial hyperglycemia, commonly used drugs are acarbose, voglibose, etc.. In addition to oral drugs, subcutaneous injection of insulin is also an important means of controlling hyperglycemia. Diabetic patients should follow the doctor’s instructions under the guidance of the physician to use drugs, not blindly use drugs.