Drinking lactulose poop out of watery stool may be caused by overdose, lactose intolerance, etc. You can use montelukast, bifidobacteria, etc. to protect the intestinal mucosa and relieve diarrhea. Reduce the dose of medication, stop the medication if necessary, and replenish water and electrolytes. If the dose of lactulose is high, or lactulose intolerance may occur watery stools, you can use montelukast to stop diarrhea. You can also take bifidobacteria at the same time to improve intestinal flora and relieve diarrhea. If there is no significant relief, the medication should be stopped promptly, and potassium chloride and other electrolyte solutions should be infused to replenish water and electrolytes to avoid dehydration. Lactulose can promote defecation, used in the treatment of constipation, hepatic encephalopathy, etc. Adverse reactions such as abdominal distension, diarrhea, nausea and vomiting may occur with the use of this drug. It is contraindicated in patients who are allergic to the drug, intestinal obstruction, etc. Pregnant women as well as breastfeeding women should use it after weighing the pros and cons under the guidance of a doctor, and electrolyte levels should be checked in time for use in the elderly. If you use the drug to have watery stools, you should promptly identify the cause under the guidance of a doctor and carry out reasonable treatment, do not blindly use the drug.