Lupron (leuprolide) is a man-made form of a hormone that regulates many processes in the body. Leuprolide overstimulates the body's own production of certain hormones, which causes that production to shut down temporarily. Lupron reduces the amount of testosterone in men or estrogen in women.
Lupron is used in men to treat the symptoms of prostate cancer. Lupron treats only the symptoms of prostate cancer and does not treat the cancer itself. But to the best of my knowledge it does not feed cancer cells.