Feminax ultra maximum strength many women suffer from severe menstrual cramping during and around their monthly periods feminax ultra has been designed to offer maximum strength pain relief for women between the ages of 15 to 50 gastro resistant tablets enteric coated for the symptomatic relief from period pains and menstrual cramps contains naproxen 250mg3 tablets per day maximumnaproxen works by reducing the production of prostaglandins which in turn reduce the contrac