Antithymocyte Globulin (ATG)

Antithymocyte Globulin (ATG) is a medication made from antibodies that target and destroy certain immune cells called T cells. It is used mainly in transplant medicine to prevent the recipient’s immune system from attacking a new organ, reducing the risk of rejection. ATG is administered through a vein and works by suppressing immune responses, helping the body accept the transplanted organ or treat some autoimmune diseases. While effective, it can also lower immunity overall, so patients are monitored carefully for infections and side effects during treatment.