What is Mefenamic Acid?
Mefenamic acid should be used to treat primary dysmenorrhea (period pain) that is not adequately controlled by suitable lifestyle changes and use of other painkillers such as Ibuprofen and Paracetamol. The brand name for this medication is Ponstan.
How does Mefenamic Acid work?
Mefenamic Acid is an NSAID which acts to reduce the production of prostaglandins which is a chemical released during a period. Prostaglandins work to cause increased contraction of the muscular wall of the uterus, which leads to an increase in pain. By reducing the production of prostaglandins, NSAIDs such as Mefenamic Acid reduce the contraction of the muscular wall of the uterus and subsequently reduce the pain experienced during a period.
How do I use Mefenamic Acid?
You should take ONE 500mg tablet THREE times a day for up to a maximum of THREE days during any one single menstrual cycle at the onset of period pain or bleeding, whichever is earlier. It should be taken with or after food, and swallowed whole with water. If you find Mefenamic Acid is not effective enough to adequately control your pain, we would recommend speaking to your GP for further advice and assistance.
What are the cautions related to using Mefenamic Acid?
Although Mefenamic Acid can be used to treat those who suffer from Period Pain, it is important to check if the medication is suitable for you. Mefenamic Acid should not be used by people suffering with certain conditions or those using certain medications.
Long-term use of Mefenamic Acid is not recommended as it can increase the risk of side effects. Also this medication should not be used at the same time as taking other NSAIDs such as Ibuprofen. You should always read the patient information leaflet (PIL) for Mefenamic Acid before taking this medication to ensure it is safe for you to use.
What are the side effects of Mefenamic Acid?
Mefenamic Acid like all medications can cause side-effects although not all patients will experience these. It is also important to note that the side effects are more commonly observed after high-dose, long-term, continuous treatment.
Mefenamic Acid side effects include:
- Nausea & Vomiting
- Loss of appetite
- Sleep disturbance
For more information about the side effects associated with Mefenamic Acid please see the patient information leaflet (PIL) or contact us.
Where can I find more information on Period Pain and Mefenamic Acid?
Please refer to the patient information leaflet (PIL) for further information on Mefenamic Acid. You can find more information on Period Pain on the Conditions category page.