According to Drugs.com, naproxen is a non-steroidal anti-inflammatory drug. It is used in the treatment of pain or inflammation associated with arthritis, tendinitis, bursitis, gout or menstrual cramps.
Naproxen may heighten the chance of heart attack or stroke when taken for an extended period of time, or when used by those with heart disease, states Drugs.com. Use of naproxen should be avoided immediately preceding or following heart bypass surgery. Naproxen may cause stomach or intestinal bleeding, which has the potential to be life-threatening. Taking this medication during the last 3 months of pregnancy may be harmful to an unborn baby, resulting in birth defects. Naproxen should not be given a child less than 2 years old without consulting a doctor.