The generic name of Dumex is lactulose oral solution, if you take it or do not have a bowel movement, consider that it may be related to the time limit of the drug itself is not enough, or with intestinal obstruction, intestinal polyps, intestinal tumors and other pathological factors, generally to drug or surgical treatment. 1. The drug itself: Lactulose oral solution usually takes effect in 12-48 hours, if the application of the drug has not exceeded 48 hours, it is considered that the time limit may not be enough, and it is recommended to wait a little longer to see if there will be a bowel movement. If there is still no bowel movement, then consider that it is not sensitive to its drug itself. 2. Pathologic factors: (1) intestinal obstruction: if the constipation is caused by intestinal obstruction, lactulose oral solution has no therapeutic effect on it, so the phenomenon of not being able to have a bowel movement even after oral intake will occur, and patients with constipation due to intestinal obstruction usually need enema treatment or surgical treatment. (2) Intestinal polyps: when the number of polyps in the intestine is large and the diameter is large, the space in the intestinal lumen will be narrowed, resulting in obstruction of defecation, and even if the oral solution of lactulose is eaten, the feces may not be discharged. One is mainly treated by endoscopic resection. (3) Intestinal tumor: when there is a tumor in the intestines, the tumor is large, leading to narrowing of the intestinal lumen or obstruction of the intestinal lumen, and constipation occurs, and feces can not be discharged even after taking Lactulose Oral Liquid orally, and it is mainly based on surgical treatment. There are many reasons for constipation, if you still can’t have a bowel movement after taking Lactulose oral solution, it is recommended to consult the doctor in time and treat under the doctor’s guidance.