Stimulant laxatives (such as senna or bisacodyl) promote contraction of the intestines, promoting the movement of stools through the bowel.īowel cleansing preparations are not treatments for constipation.Osmotic laxatives (such as lactulose) draw fluid into the bowel and soften stools.These moisten and lubricate the stool making it easier to pass Emollient stool softeners (such as docusate).These absorb water in the bowel and swell to bulk out the stool making it softer and easier to pass Bulk-forming laxatives (such as fibers or psyllium).Laxatives should generally not be used long-term unless under medical supervision because they can cause electrolyte disturbances (such as low potassium levels), dehydration, and contribute to a sluggish bowel.īefore using a laxative, lifestyle changes, such as drinking more fluid, exercising, and increasing the amount of vegetables and fiber in the diet should be tried first. They are used before bowel surgery, colonoscopy, or radiological examinations to ensure that the bowel is free of solid contents.
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