Acarbose can reduce fasting blood glucose to a certain extent, but is mostly used to reduce postprandial blood glucose, taken with meals. Acarbose is a class of glucose-lowering drugs more commonly used in the clinic, belonging to the α-glucosidase inhibitors, its glucose-lowering principle is mainly through the delay in the gastrointestinal tract on the digestion and absorption of carbohydrates, so as to play a role in lowering the role of postprandial blood glucose. Acarbose can be used in patients with high postprandial blood glucose or in combination with other hypoglycemic drugs such as metformin hydrochloride. If there is an increase in blood glucose level, you should go to the endocrinology department of the regular hospital in time, and standardize the treatment under the guidance of the doctor, do not blindly use the drug on your own.