Cyclosporine lowers your body's immune system. The immune system helps your body fight infections. The immune system can also fight or "reject" a transplanted organ such as a liver or kidney. This is because the immune system treats the new organ as an invader.
Cyclosporine is used to prevent organ rejection after a kidney, heart, or liver transplant. Cyclosporine is also used to treat severe psoriasis or severe rheumatoid arthritis.
Cyclosporine may also be used for purposes not listed in this medication guide.