Mefenamic acid is a non-steroidal anti-inflammatory drug used to treat pain, including menstrual pain. It is commercially available in the US as Ponstel and internationally by Pfizer as Ponstan, Ponstal in Asia, and in Austria as Parkemed. It is also prescribed as an antipyretic drug. It is typically prescribed for oral administration.
Since hepatic metabolism plays a significant role in mefenamic acid elimination, patients with known liver deficiency may be prescribed lower doses. Kidney deficiency may also cause accumulation of the drug and its metabolites in the excretory system. Therefore patients suffering from renal conditions should not be prescribed mefenamic acid.
Other known mild side effects of mefenamic acid include headaches, nervousness and vomiting. Serious side effects may include diarrhoea, bloody vomit, blurred vision, skin rash, itching and swelling, sore throat and fever. It is advised to consult a doctor immediately if these symptoms appear while taking this medication.