Type 2 diabetes mellitus should take glucose-lowering drugs as prescribed by the doctor, which can be metformin drugs, sulfonylureas, glinides, alpha-glucosidase inhibitors, dipeptidyl peptidase-4 inhibitors and so on. 1. Metformin: Common drugs include metformin, which can reduce hepatic glucose output and improve insulin resistance. 2. Sulfonylureas: common drugs include glibenclamide and gliclazide, which can stimulate pancreatic β-cells to secrete insulin and increase insulin level in the body. 3. Glargine drugs: such as Repaglinide, can stimulate insulin secretion, can reduce postprandial blood glucose. 4. α-glucosidase inhibitors: common drugs include acarbose, which can inhibit the absorption of carbohydrates in the upper part of the small intestine, thus reducing postprandial blood glucose. 5. Dipeptidyl peptidase-4 inhibitors: common drugs include selegiline, which can increase insulin secretion and inhibit glucagon secretion. The above drugs are recommended to be used under the guidance of a doctor, and should not be taken blindly on their own.