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Mefenamic Acid

Mefenamic Acid is an NSAID used for selected short-term pain and menstrual pain. Listed uses include Acute Pain and Dysmenorrhoea.

Ponstel

Dysmenorrhoea, Acute Pain

250 · 500mg

Ponstel is mefenamic acid 250mg and 500mg tablets for dysmenorrhoea and acute pain, a fenamate NSAID that blocks the cyclo-oxygenase enzymes.

From$0.36/ tabletView

Key points

  • It can cause gastrointestinal bleeding, kidney injury and cardiovascular events.
  • Do not combine it with another NSAID unless directed.
  • Black stools, vomiting blood or very little urine needs urgent care.

Select a listed product and pack to order online. Ask your doctor or pharmacist whether it suits you and what monitoring it needs.

Important safety checks

Ulcer history, kidney, heart or liver disease, asthma, pregnancy and anticoagulants require review.

When to seek urgent care

Seek urgent help for vomiting blood, black stools, chest pain, breathing difficulty, facial swelling or very little urine.

Further reading

What is mefenamic acid used for?

Mefenamic acid is an NSAID used for short-term (acute) pain and for period pain (dysmenorrhoea).

How does mefenamic acid work?

Mefenamic acid blocks the cyclo-oxygenase enzymes, which the body uses to make prostaglandins. With less prostaglandin, inflammation and pain signals are reduced.

Which product contains mefenamic acid?

The mefenamic acid product on SGMeds is Ponstel, and its page gives the strengths and pack sizes.

How long does mefenamic acid take to work?

Mefenamic acid starts to work within 30 to 60 minutes, and its effect lasts 4 to 6 hours.

What are the side effects of mefenamic acid?

Common side effects include nausea, indigestion and diarrhoea. Dizziness, headache and nervousness can also occur, and serious effects such as gastrointestinal bleeding, a severe allergic reaction (anaphylaxis) and kidney failure need urgent medical attention.

Can mefenamic acid be taken with other medicines?

Mefenamic acid can interact with warfarin, aspirin and corticosteroids. Do not combine it with another NSAID unless a doctor or pharmacist tells you to.

What are other names for mefenamic acid?

In other countries, mefenamic acid is also sold as Ponstan. Brand names vary between countries, so compare products by their active ingredient.

How is mefenamic acid priced?

The product on this page shows a price for each strength and pack size in Singapore dollars, converted from US dollars, so the exchange rate can change the final amount. Larger packs usually cost less per tablet.

Payment and prices →

Can I order mefenamic acid without a prescription?

Yes. SGMeds does not ask for a prescription to order mefenamic acid: we place the order with our pharmacy partner, which prepares it and arranges delivery on your behalf.

Ordering without a prescription →

Where can I buy mefenamic acid in Singapore?

You can order mefenamic acid here on SGMeds: choose the product, strength and pack, then check out. Parcels go to Singapore and Malaysia by Express shipping (tracked, up to 1 week) or Regular shipping (up to 3 weeks).

How ordering works →

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