The U.S. Food and Drug Administration (FDA) has approved the biologic drug abatacept (Orencia) to treat psoriatic arthritis (PsA) in adults. It’s already approved for rheumatoid arthritis (RA) and for one subtype of juvenile idiopathic arthritis (JIA).
Abatacept is a biologic medication that works by targeting T-lymphocytes (T cells), immune cells that are overproduced in people with inflammatory arthritis. The drug, technically called a “selective costimulation modulator,” attaches to the surface of the cells, preventing them from communicating with other cells and producing chemicals that can lead to joint damage and symptoms like pain and swelling. It’s given as a monthly infusion or weekly injection.