Like rheumatoid arthritis (RA), psoriatic arthritis is a chronic inflammatory disease of the joints and connective tissue. The disease causes joint pain and swelling that can lead to crippling along with inflamed and irritated scaly red patches of skin throughout the body. It is a progressive and debilitating disease and because there are no treatments specifically approved for psoriatic arthritis, doctors often use therapies approved for RA, including nonsteroidal anti-inflammatory drugs (NSAIDs) and disease modifying anti-rheumatic drugs (DMARDs). However, no DMARDs are currently approved for use in psoriatic arthritis. There are approximately 300,000 patients with psoriatic arthritis in the United States and the disease affects both men and women most commonly between the ages 30 and 50. Psoriatic arthritis patients are generally treated by rheumatologists and dermatologists.