IRAP (Interleuken-1 Receptor Antagonist Protein) therapy is a treatment modality used to reduce inflammation in arthritic joints. Blood is drawn and placed into a syringe containing special glass beads. It is then centrifuged for 24 hours to increase the level of the IRAP in the serum. This increased level blocks Interleukin-1 which has been shown to destroy cartilage. The serum is injected into the affected joint twice weekly for a total of 3-4 treatments. Once inside the joint, the inflammation caused by Interleukin-1 is greatly reduced.