Cecropia is commonly used to promote defecation, Cecropia has two preparations: one is glycerol preparation; the other is mannitol and magnesium sulfate preparation. Although the composition of the two preparations are different, but the basic principle is the same, are the use of glycerin or sorbitol high concentration to play a hypertonic effect, soften the stool, stimulate the intestinal wall, can reflexively cause defecation reaction, coupled with all the lubricating effect, can make the stool easily discharged. Therefore, Keseru is more commonly used in the treatment of constipation, and the effect is also more obvious drugs, most patients have a certain response to Keseru, can promote the patient’s bowel movement.