Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Calcium polycarbophil (FiberCon) and psyllium (Metamucil) are both over-the-counter fiber supplements used to treat occasional constipation, but they have some differences. Calcium polycarbophil is a synthetic fiber, while psyllium is a natural fiber from plants. Both are bulk-forming laxatives, but psyllium is more likely to cause gas and bloating. Calcium polycarbophil is available in tablet form, whereas psyllium comes in powder packets, scoopable powder, and capsules. Both need to be taken with plenty of water to avoid choking, but psyllium can also contain potassium and sodium, which might be a concern if you're on a restricted diet. Lastly, calcium polycarbophil is generally considered gentler and less likely to cause stomach cramping compared to psyllium.
Calcium polycarbophil (FiberCon)
Psyllium (Metamucil)
Calcium polycarbophil (FiberCon)
Psyllium (Metamucil)
Summary of Fibercon vs. Metamucil
Summary for Bulk-forming laxative
Calcium polycarbophil (FiberCon) is an over-the-counter medication that's used to treat occasional constipation in people 12 years and older. This bulk-forming laxative is found as a generic as well as under some familiar brand names like FiberCon and Fiber-Lax. It's available as tablets and is taken by mouth up to 4 times a day. Calcium polycarbophil (FiberCon) doesn't cause many side effects, and it's less likely to cause gas and bloating than similar medications.
Summary for Fiber laxative
Psyllium or psyllium husk (Metamucil) is an over-the-counter (OTC) fiber supplement that helps with occasional constipation. It can cause choking if you don't take it with enough water or other fluid.