There is no such thing as the best medicine for defecation, drugs have obvious individual differences, the treatment of constipation also needs to be based on individual selection of polyethylene glycol electrolyte powder, lactulose oral solution, magnesium sulfate and other drug therapy. 1. Polyethylene glycol electrolyte powder: this product can be used as an enema, but also can be used for the treatment of functional constipation, can effectively relieve the symptoms of dry stools, not easy to discharge. If allergic to this product, or suffering from intestinal perforation, gastrointestinal bleeding need to be prohibited. 2. Lactulose oral solution: it belongs to a kind of laxative, which can be used for the treatment of habitual constipation, chronic constipation, etc. It can effectively regulate the physiological rhythm of the intestine. If galactosemia, intestinal obstruction should be prohibited. 3. Magnesium sulfate: it can be used as anticonvulsant, and also can relieve constipation and improve the symptoms of dry stools, not easy to discharge caused by abnormal fermentation in the intestinal tract. If the medication causes flushing, sweating, dry mouth, it should be discontinued promptly. There are many types of bowel movement medications, patients can go to the hospital for examination before choosing, the doctor will choose the appropriate agent in combination with the severity of constipation as well as the cause.