Naprozen is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain, reduce inflammation, and lower fever. It is commonly prescribed for conditions such as Arthritis, menstrual cramps, and other types of acute pain. Naprozen works by inhibiting enzymes involved in the production of prostaglandins, which contribute to pain and inflammation. Brand names for naprozen include Aleve and Naprosyn.