I dont think you should be taking Naproxen still. I have heard it has been linked to heart attacks and severe stomach pains. Naproxen is in medications such as Celebrex and Aleve. The company that maufactures Celebrex is in a little bit of heat.
VIOXX/BEXTRA/CELEBREX HEART AND STROKE RISK
On September 30th, 2004, Merck Pharmaceuticals announced a withdrawal of its best-selling drug, Vioxx, because of its potential role in causing heart attacks and strokes. Bextra and Celebrex are similar drugs with similar risk profiles.
Do not take Celebrex without first talking to your doctor if you have had an allergic reaction to a sulfa-based medicine such as:
sulfamethoxazole (Bactrim, Septra, Gantanol, and others), sulfisoxazole (Gantrisin), and others; or
experienced asthma, hives, or an allergic reaction after taking aspirin or another NSAID such as ibuprofen (Motrin, Advil, Nuprin, and others), NAPROXEN(Aleve, Naprosyn, Anaprox), ketoprofen (Orudis KT, Orudis, Oruvail), diclofenac (Voltaren, Cataflam), diflunisal (Dolobid), etodolac (Lodine, Lodine XL), fenoprofen (Nalfon), flurbiprofen (Ansaid), indomethacin (Indocin), ketorolac (Toradol), meloxicam (Mobic), nabumetone (Relafen), oxaprozin (Daypro), piroxicam (Feldene), sulindac (Clinoril), or tolmetin (Tolectin).
I know I am mostly talking about Celebrex and i know u had a question about joint pain, but I thought this info might help a little too. You can type it in on any search engine and find some info.