Polyethylene glycol is compound polyethylene glycol electrolyte bulk, lactulose is lactulose oral solution, there is no which one is more effective. Compound polyethylene glycol electrolyte powder is used for intestinal cleansing, lactulose oral solution is used for the treatment of chronic functional constipation, intestinal obstruction, acute abdominal pain and other patients are prohibited. 1. Compound polyethylene glycol electrolyte powder is used for preoperative intestinal cleansing, and can also be used for intestinal cleansing preparation before colonoscopy, barium enema and other examinations. Lactulose oral solution is mainly used in the treatment of chronic functional constipation, both drugs have a better laxative effect, there is no argument that which drug is more effective. 2. Patients suffering from intestinal obstruction, acute abdominal pain and other diseases should not use Compound Polyethylene Glycol Electrolyte Dispersant and Lactulose Oral Solution to avoid aggravating the patient’s symptoms. 3. Compound polyethylene glycol electrolyte bulk and lactulose oral solution can be laxative, patients should follow the doctor’s instructions to use the drug. Patients who are allergic to the ingredients of the two drugs should not use them to avoid itching of the skin, dyspnea and other uncomfortable symptoms. The drugs should be used under medical supervision.