Lactulose, or lactulose oral solution, can be taken in a daily dose that can be adjusted to suit individual needs, and is more effective when taken once at breakfast. Lactulose oral solution can be taken once at breakfast to minimize smaller effects. Lactulose is easily converted into low molecular weight organic acids by the digestive flora in the colon, which will cause a decrease in pH in the intestines, and also retains water and increases the volume of feces, thus stimulating gastrointestinal motility and relieving constipation. Lactulose oral solution is often indicated for chronic or habitual constipation and can regulate the physiological rhythm of the colon. It is also used to treat and prevent hepatic coma or precomatose states. Adverse reactions such as abdominal pain and bloating can occur after use, but usually resolve on their own. It is generally used with caution in diabetic patients and is contraindicated in patients with galactosemia, intestinal obstruction, acute abdominal pain and other laxatives taken at the same time, and in those who are allergic to the product. Patients who want to use lactulose oral solution are advised to go to a regular hospital, consult a professional doctor, cooperate with the doctor to complete the relevant examinations, and avoid blind use of drugs.