Medication for diabetes is divided into oral medications as well as insulin therapy. Oral medications are commonly available in the following categories: Firstly, they are sulfonylureas. Secondly, it is the biguanide hypoglycemic drugs, biguanide drugs are more cost-effective drugs for obese type 2 diabetes patients. But the side effects are also relatively large, prone to hypoglycemia. Third, is the alpha-glucosidase inhibitors, such as voglibose, acarbose, etc.. Fourthly, it is insulin sensitizer. Fifthly, it is glargine type insulin secretagogue, such as repaglinide, nateglinide, etc.