Mefenamic Acid: uses, side effects & brands

Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed 5 November 2026

Mefenamic acid is an NSAID popular for period pain and fever in children (as Meftal-P). It belongs to the NSAID / pain reliever group. Non-steroidal anti-inflammatory drugs relieve pain, swelling and fever, but can affect the stomach, kidneys and heart.

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Drug type — dosing is set by your doctor

Measure	Range
Drug class	NSAID / pain reliever
Type	Prescription
Dose	Individual — ask your doctor or pharmacist

What it is used for

Period pain
Heavy menstrual bleeding
Mild to moderate pain for short periods

Common brand names

India: Meftal, Ponstan
Worldwide: Ponstan, Ponstel

Common side effects

Diarrhoea
Nausea or indigestion
Drowsiness or dizziness
Rash

Before taking it — precautions

Use only for short courses as advised
Tell your doctor about stomach ulcers, asthma, kidney, liver or heart disease, or pregnancy
Avoid combining with other NSAIDs; tell your doctor about blood thinners

When to see a doctor urgently

Diarrhoea that is severe or ongoing — stop and see a doctor
Black stools or vomiting blood (urgent)
Swelling of the face, wheezing or severe rash (urgent)

Not a prescription — no dose shown. The right dose of mefenamic acid depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.

Frequently asked questions

Does mefenamic acid reduce period bleeding?

Yes — besides easing cramps, it can lessen heavy menstrual bleeding.

What should I do if I get diarrhoea?

Stop taking it and talk to your doctor, as diarrhoea can be a sign you should not continue.

Can I take it for long periods?

No — it is meant for short courses because of stomach and kidney risks.

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Sources & further reading

Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.