There are many kinds of drugs for the treatment of constipation, the signs of constipation are different, the time is different, the age is different, the symptoms are different, and the choice of laxative is also different, as follows: 1, the most commonly used open plug, the main ingredient is glycerin, mainly in the anal opening of the block of stool, as soon as possible to soften the stool, thinning, in order to defecate as soon as possible. 2, lactulose oral solution, is a slow laxative laxative drugs, lactulose has biosaccharide osmotic activity, so that water and electrolytes in the small intestine to retain, and then play a direct role in the intestinal nerve. Fructose has biosaccharide osmotic activity, so that the water and electrolytes in the small intestine to retain the effect of hyperosmolarity in the intestine and then play a diarrheal effect, will not act directly on the intestinal nerve, suitable for the treatment of senile constipation and chronic constipation. 3, fruit guide tablets, also known as oral phenolphthalein tablets, the main role in the colon, after taking will slowly decompose in the small intestine alkaline intestinal fluid environment, for the treatment of habitual stubborn constipation. 4, there are Magnesium sulfate and the Chinese herb senna, rhubarb, etc., have to be used under the guidance of a physician.