What is Ponstan for?

Ponstan is a type of Nonsteroidal anti-inflammatory drugs (NSAIDs). It is mainly used for localised pain relief and reducing inflammation, and is very effective on affected areas like muscles and bone, which may be caused by sports-related injuries or accidents. It is indicated for pain relief including migraine, menstrual pain and osteoarthritis.

How to use it?

Ponstan is taken orally for ages above 12 years old. The usual initial dose is 500 mg at the onset of symptoms, followed by 250 mg every 6 hours as needed. Do not use it for more than 7 days.


It can be taken with food to relieve stomach discomfort. It can also be used with a short duration of acid reducing medicines (e.g. Omeprazole, Pantoprazole), or a stomach acid reducing antihistamine (e.g. Famotidine) to prevent this side effect.

What are the side effects of Ponstan?

Common side effects of Ponstan include nausea and vomiting, and mild indigestion.

For people taking Ponstan long-term, it may cause kidney injury and stomach bleeding.

Who should not take Ponstan?

  • People who are allergic to Mefenamic acid or any component of the formulation.
  • People who are allergic to NSAIDs and have a history of hypersensitivity reactions (e.g. asthma, urticaria) after taking Aspirin or any other NSAIDs.
  • Patients who has chronic kidney disease

Pharmacist Tips:

  • Do not use Ponstan for more than 7 days.
  • Only take one NSAIDs at any one time, do not combine Ponstan with other NSAIDs medicines.

Common dosing schedule:
Ponstan can be taken with food or milk to minimize gastric irritation.

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


Some common medications Ponstan may interact with:

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

Where to buy Ponstan in Hong Kong?

In Hong Kong, Ponstan is a prescription only medicine, and requires a prescription from a doctor to be purchased in a pharmacy. 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 Ponstan 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
  • 250mg (Capsules)
  • 500mg (Tablets)
Drug class
Sub class
Non-Steroidal Anti-Inflammatory Drugs (NSAIDs)
Generic Names
Other drugs in same class
Methyl Salicylate
Used for: Pain relief
Chinese name:
Used for: Pain relief, Osteoarthritis, Rheumatoid arthritis, Pain and inflammation in musculoskeletal and joint disorders, Inflammation
Chinese name:
Used for: Inflammation, Rheumatoid arthritis, Gout, Pain, Osteoarthritis, Fever
Chinese name:
Used for: Pain, Inflammation
Chinese name:
Used for: Pain, Inflammation, Fever, Gout
Chinese name: