Drugs that promote defecation are laxatives, and there are three types: volumetric, osmotic, and stimulant, and the representative drugs for each of them are polycarbophil calcium, polyethylene glycol, and bisacodyl, respectively.
1. Volumetric: This type of medicine is to increase the volume of feces by increasing the water content of feces to promote defecation. Representative drugs include polycarbophil calcium, which is suitable for chronic constipation and other diseases, but prohibited for acute abdominal diseases, such as appendicitis and intestinal bleeding. Adverse reactions such as belching and vomiting may occur when taking this drug, and it should be noted that it should be used with caution when suffering from hypercalcemia.
2. Osmotic: This type of medicine is to make the intestinal tract form a hypertonic state, absorb water to increase the volume of feces, stimulate defecation. Representative drugs have polyethylene glycol, the drug is suitable for constipation, but intestinal obstruction and other diseases patients are prohibited. Taking the drug will appear nausea, abdominal pain adverse reactions, need to pay attention to try not to long-term use.
3. Stimulant: This type of medicine is to increase the water content of feces and promote defecation by reducing the absorption of water in the large intestine. Representative drugs are bisacodyl. This drug is suitable for constipation and preoperative and postoperative bowel cleansing. It is contraindicated in acute abdomen, allergy to this drug. During the administration of the drug there are adverse reactions with abnormalities of water electrolytes. It is necessary to pay attention to the fact that after taking this drug, you should not take milk for 2 hours.
All of the above medications need to be used under the guidance of a doctor, choose the right medication for the individual condition and avoid self-medication.