Efficacy of Flavocoxid 500 mg Compared With Naproxen 500 mg in Subjects With Moderate-severe Osteoarthritis of the Knee

Inclusion Criteria

• Willing and able to read and understand informed consent and questionnaires in English.
• Adults of either gender age 35-75 years, in general good health.
• Established X-ray diagnosis of osteoarthritis of at least one knee.
• Taken NSAID including COX-2 (cyclo-oxygenase-2) inhibitor in full therapeutic dose for at least one month prior to screening.
• Able and will to discontinue osteoarthritis medications until flare criteria met.
• BMI 2.0 or nephrotic syndrome with 24 hour protein excretion >1000mg.
• Intra-articular injection of any hyaluronic acid preparation in the target knee joint within 4 months of baseline visit.
• Intra-articular injection of a corticosteroid in the target knee joint within 2 months of the baseline visit.
• BMI>45
• History of allergic reaction to flavonoid or flavan containing foods or products (example: red wine, colored fruits and vegetable, brazil nuts, tea, natto)
• History of allergy to aspirin, naproxen or other NSAID
• History of substance abuse including alcohol, or any psychiatric condition that may impair the subject's ability to comply with the study requirements.
• Any medical condition that, in the opinion of the investigator, might put the subject at undue risk or might interfere with the subject's ability to participate in the study.
• Participation in another clinical trial within 30 days or 7 half lives of the study agent, whichever is longer, of the screening visit.