Bayerisepine that is, Acarbose, after eating constipation is normal or not need to identify the cause of the disease, may be the side effects of Acarbose, but also may be functional and pathologic constipation, such as hemorrhoids, hypothyroidism and so on. 1. Acarbose adverse reactions: Acarbose is a common oral drug for the treatment of diabetes mellitus and the reduction of postprandial blood glucose in glucose intolerance abnormalities, and should be chewed during meals. Common adverse reactions of acarbose are gastrointestinal discomfort, such as flatulence, bowel sounds, abdominal pain, diarrhea, constipation, intestinal obstruction, skin irritation, jaundice, liver damage, liver function abnormalities. The common contraindications of acarbose are allergy to acarbose and its active ingredients, gastrointestinal dysfunction with obvious digestion and absorption disorders, severe renal impairment and diabetic ketoacidosis. 2. Functional constipation: Physiological constipation can be caused by low intake of food, intake of fiber, too little water, and mental stress. 3. Organic constipation: due to perianal diseases such as hemorrhoids and anal fissures, which cause pain during defecation and thus fear of defecation, causing the symptoms of constipation. In addition, other diseases, such as hypothyroidism, diabetes mellitus and other systemic diseases, make defecation weak, resulting in constipation. Taking acarbose and its guiding dosage also need to be taken under the guidance of a professional physician, do not blindly use the drug, constipation also need to consult a doctor in a timely manner to clarify the cause of the disease, so as not to delay treatment.