Mefenamic acid
Also sold as: Ponstan, Meftal
Prescription neededAnti-inflammatory painkillers (NSAIDs)
Comes as:CapsuleTabletSuspension
Also sold as: Ponstan, Meftal
Usual adult dose: 500 mg three times a day after food. Mostly used for period pain; do not use for more than 7 days at a time.
Your doctor may give you a different dose. Children's doses depend on weight.
Stop taking it and see a doctor straight away if you notice:
Medicines that can react with this one.
Raises the risk of serious bleeding.
Can raise lithium levels in the blood; levels may need checking.