Over-the-counterLower-cost generic available

Metamucil

(Psyllium)

Back to: Full Site NavigationSkip to: side effects sectionSkip to: What to expect sectionSkip to: Risks and warnings sectionSkip to: Tips from users and pharmacists

Helps get things moving.

Skip Upsides & Downsides section. Skip to side effects section.
Over-the-counterLower-cost generic available

Our pharmacists’ bottom line

The natural psyllium fiber in Metamucil (Psyllium) does more than relieve constipation. It lowers cholesterol, keeps blood sugar levels healthy, and makes you feel less hungry between meals.

Worth it?Is it worth it?
Works well?Does it work?
Hassle?Is it a hassle?
  • Psyllium is the most recommended brand of natural fiber laxative
  • Some people feel that taking Psyllium is a hassle, but most think it's worth it.
  • It has multiple health benefits, good to control your hunger between meals, improves your blood sugar and lowers cholesterol levels.
  • Studies show it works better than a stool softener for constipation.
  • You may have to take Psyllium daily for 1-3 days to see full effects.
  • If you don't take it with enough liquid, it could swell, block your throat and cause choking.
  • Not the best choice for people who have swallowing problems or aren't able to drink lots of liquids.
  • Psyllium contains psyllium. Don't take if you have an allergy to psyllium from breathing it in or swallowing it.
  • Can cause gas and mild belly cramps.
No pricing data for this drug at this filter setting. Try searching onGoodRx
Skip side effects sections. Skip to What to Expect and Pharmacists Tips section.

Side effects for Metamucil (Psyllium)

Button Group. All currently active
Button Group. All currently active

These are side effects of Metamucil (Psyllium) reported to the FDA by people taking it, and by doctors and pharmacists.

0 reports

What to expect when you take Metamucil (Psyllium)

Skip what to expect section. Skip to Risks & Warnings section.
Tips from our pharmacists
  • Psyllium works in about 12-72 hours for constipation.
  • It's important to take each dose with at least 8 ounces (a full glass) of water or other liquid (not hot liquids).
  • Mix powder well and drink right away up to 3 times a day (build up to this slowly), but not for more than one week.
  • Don't take Psyllium within 2 hours before or after taking other medicines. It may interact and affect how they work.
  • If you take Psyllium then have chest pain, vomiting, trouble breathing or swallowing, get medical help immediately.
  • Ask your doctor before taking Psyllium if you have stomach pain, nausea, vomiting or had sudden changes in your stool for more than 2 weeks.
  • Ask your doctor about giving Psyllium to anyone younger than 12 years.
  • Stop taking Psyllium and call your doctor if you have pain, swelling or bulging in your belly, rectal bleeding or have not had a bowel movement after taking.
  • Talk to you doctor about eating certain foods and getting more exercise to help prevent your constipation.

Risks and Warnings for Metamucil (Psyllium)

Skip Risks and Warnings section. Skip to Tips section.
    • Higher risk if:
    • Age 60 or older
    • Malignancy
    • Other condition that causes blockage or narrowing of bowel
    • Taking medications that cause constipation

    Stop taking Metamucil (Psyllium) and call your doctor right away if you have nausea, vomiting, pain or bulging in your belly that doesn't go away, have rectal bleeding, and no bowel movement after taking. These may be symptoms of a bowel blockage (bowel obstruction) which is serious.

Means that some groups have a high risk of experiencing this side effect

Tips from pharmacists and people taking Metamucil (Psyllium)

Final section. Do you want to return to drug navigation?
The FDA category for this medication is N. It is advised that you: Unknown
Pregnancy
Food
  • Upsides and downsides from our pharmacists
  • It has multiple health benefits, good to control your hunger between meals, improves your blood sugar and lowers cholesterol levels.
  • Tips from our pharmacists
  • Talk to you doctor about eating certain foods and getting more exercise to help prevent your constipation.