Acarbose is an oral hypoglycemic drug commonly used in clinical practice. Acarbose is a glycosidase inhibitor, which can lower postprandial blood sugar by inhibiting intestinal glycosidase activity and delaying the digestion and absorption of intestinal carbohydrates, so that the action of acarbose mainly has the following characteristics: 1. Acarbose is mainly used to lower postprandial blood sugar, and no serious hypoglycemia occurs when acarbose is used alone. 2. Acarbose can be used alone or in combination with other hypoglycemic agents, such as biguanide preparations, sulfonylurea hypoglycemic agents, insulin sensitizers and insulin. 3. Acarbose can be used in patients with abnormal glucose tolerance and helps delay the development of diabetes in patients with abnormal glucose tolerance. 4. The common side effects of acarbose are abdominal pain, bloating and diarrhea, which are related to the drug’s inhibition of intestinal glycosidase activity, resulting in food prolonged retention time in the intestine and enhanced bacterial spoilage, leading to increased gas production.