Written by Sonia Amin Thomas, PharmD, BCOP | Reviewed by Joshua Murdock, PharmD, BCBBS Published on May 6, 2022 Key takeaways: Metamucil (psyllium husk) is an over-the-counter supplement used most commonly for constipation. But it has other benefits and is a good source of fiber. Common Metamucil side effects include gas, bloating, and nausea. It’s...
