Taking acarbose causing diarrhea suggests reducing the dose and adjusting the medication if necessary. Acarbose tablets are used in the treatment of type 2 diabetes mellitus, belonging to the alpha-glucosidase inhibitors, by inhibiting the activity of intestinal glycosidase, delaying the conversion of carbohydrates into glucose, delaying the absorption of glucose, thus reducing postprandial blood sugar. Acarbose medication is taken as a whole tablet swallowed immediately before a meal or chewed together with a few mouthfuls of food before eating, and the dosage varies from person to person. Diarrhea and bloating after taking acarbose are common gastrointestinal adverse reactions. Starting with a small dose and gradually increasing the dose is an effective way to minimize adverse reactions. Severe bloating and diarrhea can occur when excessive amounts of acarbose tablets are taken with carbohydrate-containing foods or beverages. Contraindications include hypersensitivity, patients with chronic gastrointestinal dysfunction with significant digestive and absorption disorders, patients with severe hiatus hernia, intestinal obstruction and intestinal ulcers, and patients with severe renal impairment. Patients who need to be treated with acarbose should be under the guidance of a doctor, and should not blindly use the drug on their own.