Naproxen is used to relieve pain, swelling, stiffness and tenderness that is associated with arthritis, according to the National Institute of Health. The drug can be prescribed at high doses by doctors to help relieve pain from arthritis, bursitis, and menstrual cramps.
Naproxen can also be bought over-the-counter. Nonprescription naproxen is used to reduce fever and to reduce mild pain such as headaches, muscle aches, mild arthritis, toothaches and backaches states the National Institute of Health. This drug is part of a class of drugs known as non steroidal anti-inflammatory drugs. This class of drugs are used to reduce inflammation in the body.