what is rapamycin
Sirolimus, also called rapamycin, is a drug that is used to suppress the immune system in people who have had kidney transplants.It is given in combination with other drugs to prevent rejection of transplanted kidneys.This test measures the amount of sirolimus in the blood.irolimus, also called rapamycin, is a drug that is used to suppress the immune system in people who have had kidney transplants.