Constipation, constipation, constipation, the following types of laxatives are commonly used: 1, volumetric laxatives; 2, stimulant laxatives; 3, osmotic laxatives, each of these laxatives has its own characteristics, there is a gastrointestinal dynamic laxatives, there is a lubricating laxative, each laxative has its own advantages and disadvantages. In general, stimulant laxatives have a fast onset of action, but have many adverse reactions, and are suitable for short-term temporary use, not recommended for long-term use, which can bring greater impact on the human body, such as if the conductive tablets and senna, etc. The laxatives that are clinically recommended to be safe and can be taken for a long time are osmotic laxatives, represented by polyethylene glycol-4000 such as Fosone, and lactulose, which are more clinically used and mainly act on the small and large intestine, which can increase the amount of liquid in the intestinal stool and soften the stool by changing the permeability of the intestinal cavity, which is very safe for the elderly and children. It is safe for the elderly and children. There is also a common type of laxative, which is a lubricant laxative, they do not have a great impact on the human body and can be applied for long-term use. Of course, it is advisable for patients to go to the hospital to confirm with the doctor after the use of specific drugs.