A drug used to help prevent the body from rejecting organ and bone marrow transplants. It is also being studied as a treatment for cancer. Rapamycin belongs to the family of drugs called immunosuppressants. It is now called sirolimus.

Rapamycin belongs to a group of medicines known as immunosuppressive agents. It is used to lower the body's natural immunity in patients who receive kidney transplants. When a patient receives an organ transplant, the body's white blood cells will try to get rid of (reject) the transplanted organ. Rapamycin works by preventing the white blood cells from getting rid of the transplanted organ. Back

An immunosuppressive drug commonly given to transplant patients to avoid organ rejection. Rapamycin binds to and inhibits a key regulatory protein called the target of rapamycin (TOR).