If the constipation can be relieved, you can follow the doctor’s instructions to reduce or stop using lactulose. 1. Lactulose can stimulate gastrointestinal motility, keep the bowels open and relieve constipation, and can be used for the treatment of chronic or habitual constipation, as well as for the treatment and prevention of hepatic encephalopathy or precomatose state. Treatment with this drug is contraindicated in patients with hypersensitivity to this drug or any of the dressing components, gastrointestinal obstruction, gastrointestinal perforation or risk of gastrointestinal perforation, acute abdominal pain, low-sugar diets, and hypokalemia. 2. Patients taking lactulose to treat constipation can generally see the effect within 3 days, when the constipation symptoms are relieved can be considered to reduce or stop the drug; after taking the drug may have abdominal discomfort, abdominal pain or flatulence, nausea, vomiting and other adverse reactions, long-term use of high-dose may appear hydroelectrolyte disorders. Patients who need to take lactulose should be under the guidance of a doctor to use the drug, need to reduce the drug also please follow the doctor’s advice.