Laxatives

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Brand Name Generic name IBS type Type Comments
Metamucil® psyllium IBS-C Supplement Psyllium is a bulk-forming fiber laxative. Psyllium works by absorbing liquid and swelling in the intestines to create a softer, bulky stool that is easier to pass.
Miralax®, Glycolax® polyethylene glycol IBS-C Over-the-counter Polyethylene glycol is an osmotic laxative. Polyethylene glycol works by retaining water in the stool, resulting in softer stools and more frequent bowel movements.