The main principle is to increase the osmotic pressure through the high concentration of sorbitol and glycerin, so that more water flows into the intestine to soften the stool, and can have a stimulating effect on the intestinal wall, causing a defecation reflex to promote the discharge of stool. Glycerin itself has a lubricating effect, not only as a lubricant, but also has the effect of hydration and moisturization, which also helps the smooth discharge of stool. Because of the stimulant laxative, the effect is relatively fast, suitable for patients with blocked stools or urgent defecation, but the long-term use of corkage is prone to dependence leading to habitual constipation, which is due to the poor sensitivity of the rectum due to excessive stimulation.