Feminax Ultra Tablets (Naproxen 250mg). Naproxen Is A Type Of Medicine Called A Non-Steroidal Anti-Inflammatory Drug (NSAID). It Works By Blocking The Action Of An Enzyme In The Body Called Cyclo-Oxygenase (COX).

COX Is Involved In Making Substances In The Body Known As Prostaglandins, Both In Response To Injury And In Certain Diseases And Conditions. The Prostaglandins Cause Pain, Swelling And Inflammation. Naproxen Reduces Inflammation And Pain By Reducing The Production Of These Prostaglandins.

Naproxen Is Good For Relieving Period Pain Because It Reduces The Production Of The Prostaglandins That Are Involved In Making The Womb Contract During Your Period.