Naproxen is a medicine that reduces inflammation and pain in joints and muscles.
It’s used to treat diseases of joints, such as rheumatoid arthritis, osteoarthritis and gout.
It’s also used for period pain and muscle and bone disorders, such as back pain and sprains and strains.
Naproxen is available on prescription as tablets or as a liquid that you drink. You can buy it without a prescription from a pharmacy for period pain.
Brands include Feminax Ultra, Period Pain Reliever and Boots Period Pain Relief.
Naproxen can only be taken by children when it’s prescribed for them.
Source: NHS UK