What is Metamucil?
Metamucil is a bulk-forming fiber laxative that is used to treat occasional constipation or bowel irregularity.
Metamucil may also help lower cholesterol when used together with a diet low in cholesterol and saturated fat.
Metamucil may also be used for purposes not listed in this medication guide.
Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.
Before taking this medicine
You should not take Metamucil if you have ever had an allergic reaction to it.
Ask a doctor or pharmacist if Metamucil is safe to use if you have ever had:
trouble swallowing; or
a sudden change in bowel habits lasting longer than 2 weeks.
Ask a doctor before using this medicine if you are pregnant or breastfeeding. Your dose needs may be different during pregnancy or while you are nursing.
Do not give Metamucil to a child younger than 6 years old without medical advice.
How should I take Metamucil?
Use exactly as directed on the label, or as prescribed by your doctor.
Metamucil can swell in your throat and cause choking if you don't take it with enough liquid. Drink plenty of fluids each day to help improve bowel regularity.
Take Metamucil with a full glass (at least 8 ounces) of water or other liquid.
Swallow Metamucil capsules one at a time.
Metamucil powder must be mixed with liquid before you take it. Do not swallow the dry powder. Mix with at least 8 ounces of liquid such as water or fruit juice. Stir and drink this mixture right away. Add a little more water to the glass, swirl gently and drink right away.
Metamucil usually produces a bowel movement within 12 to 72 hours.
Call your doctor if your symptoms do not improve, or if they get worse.
Metamucil may be only part of a complete program of treatment that also includes diet, exercise, and weight control. Follow your doctor's instructions very closely.
Store at room temperature away from moisture and heat. Keep the container tightly closed when not in use.
What happens if I miss a dose?
Since Metamucil is used when needed, you may not be on a dosing schedule. Skip any missed dose if it's almost time for your next dose. Do not use two doses at one time.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking Metamucil?
Avoid breathing in the dust from Metamucil powder when mixing. Inhaling this medicine dust may cause an allergic reaction.
If you take Metamucil as part of a cholesterol-lowering treatment plan, avoid eating foods high in fat or cholesterol or your overall treatment will not be as effective.
Metamucil side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using Metamucil and call your doctor at once if you have:
constipation that lasts longer than 7 days;
rectal bleeding; or
severe stomach pain.
Common side effects may include:
minor change in your bowel habits.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What other drugs will affect Metamucil?
Metamucil can make it harder for your body to absorb other medicines you take by mouth, possibly making them less effective. If you take any oral medicines, take them 2 hours before or 2 hours after you take this medicine.
Other drugs may affect Metamucil, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.
Frequently asked questions
- Is it normal to have rubber like jelly in the stool when taking Metamucil?
- What to do for bloating while taking Metamucil?
- Metamucil - does it accelerate acid reflux?
More about Metamucil (psyllium)
- Side Effects
- During Pregnancy or Breastfeeding
- Dosage Information
- Patient Tips
- Drug Interactions
- Compare Alternatives
- Support Group
- En Español
- 50 Reviews
- Drug class: laxatives
Related treatment guides
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Copyright 1996-2021 Cerner Multum, Inc. Version: 9.01.