Lidu is the trade name, generic name is lactulose oral solution, dry stool caused by anal fissure can take lactulose oral solution, but should be under the guidance of a doctor. Lactulose oral solution can improve the dryness of the stool, promote the speed of gastrointestinal peristalsis, and can increase the acidity of the stomach and intestines, play the permeability, improve the bacterial metabolism, so as to play a diarrhea effect on the dryness of the stool and the anal fissure caused by the discomfort of a certain role in relieving. Lactulose oral solution can be used for the treatment of constipation and other diseases caused by discomfort, long-term blind use may occur gastrointestinal flatulence, abdominal pain, nausea and other adverse reactions, pregnant and lactating women and patients allergic to the drug is prohibited. If the phenomenon of anal fissure occurs, you should go to the hospital in time for consultation. The above drugs need to be used under the guidance of a doctor to avoid adverse consequences.