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Metamucil is a fiber supplement known for its laxative properties and is used to promote digestive health.

Last Modified: 09 May 2024

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What is Metamucil? 

Metamucil is a fiber supplement known for its laxative properties and is used to promote digestive health. 

Metamucil contains psyllium or ispaghula husk, a natural dietary fiber, as its active ingredient. Inactive ingredients may include sweeteners, flavorings, and coloring agents. 

Psyllium husk, the bulk-forming fiber in Metamucil, is derived from the seeds of the Plantago ovata plant. It absorbs liquid in the intestines and swells to form a soft, bulky stool. 

Global Name

Generic name:  Psyllium or ispaghula husk
Brand names:  Metamucil, Fiberall, Konsyl, Fybogel, Isabgol 



What is Metamucil used for? 

Metamucil is used to treat occasional constipation, to help maintain regularity, and to lower cholesterol when used as part of a diet low in saturated fat and cholesterol. 

How do you use Metamucil? 


Metamucil is available in powder, capsule, and wafer forms. 

Dosage information: 

  • Adults and children over 12: One rounded tablespoon in 8 ounces of liquid, 1 to 3 times daily. 
  • Children 6-11: Half the adult dose, as recommended by a doctor. 
  • Children under 6: Consult a doctor. 


  • Children: Yes, with proper dosage. 
  • Adults: Yes. 
  • Elderlies: Yes, but with caution to avoid potential choking. 
  • Pregnancy and Lactation: Generally considered safe but consult a healthcare provider. 

Is there anyone who can’t take Metamucil? 

  • Children: Under 6 should only use under medical supervision. 
  • Adults: Those with swallowing difficulties should be cautious; advised to take with adequate water/fluids. 
  •  Those allergic to psyllium or any ingredients in Metamucil should avoid it. 

Any warnings and precautions : 

Take enough liquid to avoid choking. It should not be taken immediately before bedtime. 


Metamucil may affect the absorption of some medications. Take other meds at least 2 hours before or after Metamucil. 

Side Effects

Possible side effects include bloating, gas, or an allergic reaction. 

Pharmacist Tips

  • Adequate Fluid Intake: Always take Metamucil with a full glass of water to avoid choking and to help the fiber expand. 
  • Gradual Increase: Start with lower doses to minimize gas and bloating and gradually increase as your body adapts. 
  • Consistency in Diet: Integrate Metamucil into a consistent dietary routine for best results in managing constipation. 
  • Observe Medication Interactions: Wait at least 2 hours after taking other medications to avoid interactions. 
  • Storage Information: Keep Metamucil in a cool, dry place. If using the powder form, keep the container tightly closed. 
  • Handling Instructions: Use the measuring tool provided with the product for accurate dosing. 


Where is Metamucil available in Hong Kong?

Metamucil is an over the counter (OTC) medication that can be sold without a prescription. It is found in all chain drug stores, including Mannings and Watsons. 



Can I take Metamucil every day?

Yes, Metamucil can be taken daily as part of a balanced diet to promote regularity. 

Does Metamucil help with weight loss?

While not a weight loss product, Metamucil can help you feel fuller longer when taken before meals. 

Is Metamucil available for purchase over the counter?

Yes, Metamucil is available over the counter without a prescription.

When is the best time to take Metamucil?

The best time to take Metamucil varies depending on individual preferences, but some general guidelines can be followed. It is recommended to take Metamucil consistently as directed by a healthcare professional or product label. Many people find it convenient to take it with meals or around meal times. Adequate hydration is essential, so taking Metamucil with a large glass of water is important. Adjusting the timing based on personal needs and observing how the body responds can help determine the optimal time of day. 


This website provides content related to drug use and medicine for informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Do not use the information on this website to diagnose or treat a health problem or disease without consulting a qualified healthcare provider. The website's owners and contributors are not liable for any repercussions, adverse effects, or consequences resulting from the use of any medication or information provided herein.

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