naproxen and naproxen sodium, potent nonsteroidal anti-inflammatory drugs (NSAID) used to alleviate the minor pain of arthritis, menstruation, headaches, and the like, and to reduce fever. Along with ibuprofen and ketoprofen , they belong to the propionic acid class of NSAIDs. They have been available as prescription drugs for arthritis from 1976. Naproxen sodium was approved at a low dosage as an over-the-counter painkiller in the United States in 1994; it was first marketed under the tradename Aleve. Side effects may include gastrointestinal distress and dizziness, and renal impairment has been reported in some instances with long-term use. The drugs should not be used by those who are allergic to aspirin .

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