Fasting blood glucose 15mmol/L, after diagnosis of diabetes can take metformin, acarbose and other oral hypoglycemic drugs to control blood glucose, but also can be injected insulin to lower sugar. Drugs should be selected under the guidance of the doctor according to the individual situation, different patients have different medication programs. Diabetes can be diagnosed when fasting blood glucose is 15mmol/L (over 7.0mmol/L) and if it is accompanied by diabetic symptoms such as excessive drinking, excessive eating, excessive urination and weight loss. Diabetes can be controlled by oral hypoglycemic drugs to control blood glucose, which are more varied, the specific choice of drugs should be based on their own situation, common hypoglycemic drugs include metformin, acarbose, engegliflozin and so on. Type 1 diabetes mellitus, severe acute or chronic complications of diabetes, type 2 diabetes mellitus by oral hypoglycemic drugs still do not achieve blood glucose control goals, special types of diabetes, etc., can be injected with insulin to lower sugar. It is recommended that patients with high blood glucose should seek medical treatment in time, under the guidance of doctors, and should not take medication without authorization.