The fasting blood glucose range of healthy people is 3.9~6.1mmol/L. The patient’s fasting blood glucose of 6.6mmol/L is higher than normal, but whether he needs to take hypoglycemic drugs needs to be combined with the postprandial blood glucose and the related clinical manifestations to judge together. If the fasting glucose is impaired leading to elevated fasting glucose, it is recommended to control the diet, moderate exercise, and if the blood glucose is still poorly controlled, the patient can take medication as prescribed by the doctor. Although the patient’s fasting blood glucose 6.6mmol/L is higher than normal, but has not reached the diagnostic standard of diabetes mellitus, whether to take medication should be combined with the postprandial blood glucose and other indicators to determine, can not be generalized. If the patient’s postprandial blood glucose value is normal, and there is no relevant clinical manifestations, generally do not need to take hypoglycemic drugs, through lifestyle intervention, blood glucose can be controlled. However, if the patient’s postprandial blood glucose is greater than or equal to 11.1 mmol/L, and the patient is accompanied by diabetic symptoms such as polydipsia, polyphagia, polyuria, and weight loss, the patient can be treated with diet and exercise therapy to lower the blood glucose, and at the same time need to comply with the doctor’s instructions to standardize the treatment of oral hypoglycemic drugs such as Metformin, Acarbose, and other medications. It is recommended that patients with abnormal fasting blood glucose values go to the hospital in time to avoid delays.