> Western Medicines > Metamucil


Used for: Constipation
Chinese name:

What is Metamucil for?

Metamucil is a bulk-forming laxative. It is made of the herb Ispaghula husk. It can absorb liquid in the intestine to make stool more bulky and softer, so that stool can pass more easily. Therefore, Metamucil is used for treating constipation.

How to use it?

Metamucil is available as oral powder in Hong Kong. Mix powder with a full glass of water or juice. Then drink and rinse the glass with a little bit of the fluid added and drink the remaining.


Child above 12 years of age, adult and elderly
2.5-30 g daily in divided doses.


Child between 6-11 years of age
1.25-15 g daily in divided doses.

What are the side effects of Metamucil?

Common side effects of Metamucil include abdominal cramps, diarrhoea, hypersensitivity upon inhalation, allergic conjunctivitis and bronchospasm.

Who should not take Metamucil?

  • People allergic to Psyllium or any component of the formulation.
  • People with obstruction in the gastrointestinal tract.
  • People with faecal impaction.

Pharmacist Tips:

  • Separate Metamucil 2 hours from taking other medications.
  • Mix oral powder with a full glass of water or juice. Then drink and rinse the glass with a little bit of the fluid added and drink the remaining.
  • Add fruits and vegetables to your diet.
  • Don’t ignore the urge to defecate.

Common dosing schedule:
Metamucil is taken in divided doses.


This schedule is for reference only, adjustments may be made according to individual needs.


Some common medications Metamucil may interact with:

  • N/A

Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.

Where to buy Metamucil in Hong Kong?

In Hong Kong, Metamucil is an over-the-counter medicine and can be purchased without a prescription from any retail outlet in Hong Kong. This includes grocery stores, convenience stores, medicine shops, and pharmacies. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.


For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at https://www.drugoffice.gov.hk

Need more information?

For detailed information about the use of Metamucil in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.

Available dosage
  • (Oral Powder)
Drug class
Sub class
Bulk-Forming Laxatives
Generic Names
Other drugs in same class
Normacol Plus
Used for: Constipation
Chinese name:
Used for: Constipation, Irritable bowel syndrome
Chinese name:
Used for: Constipation
Chinese name: