Etoposide phosphate (brand names: Eposin, Etopophos, Vepesid, VP-16)'s an inhibitor of the enzyme topoisomerase II. It's used as a form of chemotherapy for malignancies such as Ewing's sarcoma, lung cancer, testicular cancer, lymphoma, non-lymphocytic leukemia, and glioblastoma multiforme. It's often given in combination with other drugs. It's also sometimes used in a conditioning regimen prior to a bone marrow or blood stem cell transplant. Its chemical make-up derives from podophyllotoxin, a… (More on Etoposide)