A drug used to treat acute leukemia. It is sometimes used with other drugs to treat Hodgkin lymphoma, non-Hodgkin lymphoma, rhabdomyosarcoma, neuroblastoma, and Wilms tumor. It is also being studied in the treatment of other types of cancer. Vincristine sulfate blocks cell growth by stopping cell division. It is a type of vinca alkaloid and a type of antimitotic agent. The brand name Oncovin has been taken off the market and is no longer available.