Mefenamic Acid

Mefenamic acid is a non-steroidal anti-inflammatory agent which offers relief of pain and reduces blood loss associated with heavy menstrual bleeding.

Mefenamic Acid works by blocking the effect of natural chemicals called cyclo-oxygenase (COX) enzymes. This enzyme is needed to make other chemicals in the body called prostaglandins, which cause pain and inflammation.

One tablet is swallowed three times daily with food. It should be started at the onset of menstrual pain and continued for a few days only, as advised by our Click Doctors until your period pain settles.

Like all medicines, taking Mefenamic acid can cause potential side effects but these may not necessarily be experienced. These include stomach pains, heartburn and/or indigestion, dizziness, nausea, vomiting, diarrhoea and mouth ulcers.
Other less common but more serious side effects include severe indigestion and stomach pains, unusual bruising or bleeding, seizures, muscle cramps, headaches, on-going fevers and/ or mouth ulcers. If you experience any of these side effects, stop taking the tablets and seek immediate medical assistance.

Some medicines are not suitable for people with certain conditions or on particular medicines. For this reason, it is very important you declare your full medical history to our Click Doctors via our online consultations so that a proper judgement can be made on its safety.

Mefenamic acid should not be taken:

• If you have inflammatory bowel disease.
• If you have history of gastrointestinal bleeding or perforation
• If you have active, or history of recurrent peptic ulcer
• If you have severe heart, liver or kidney failure
• During the last trimester of pregnancy

For full information on how to take, side effects and precautions, it is important that you carefully read the patient information leaflet.