The active ingredient in a drug used together with other drugs to treat several types of cancer, including advanced Hodgkin lymphoma and advanced testicular germinal-cell cancers. It is also being studied in the treatment of other types of cancer. Vinblastine comes from the periwinkle plant Vinca rosea Linn. It blocks cell growth by stopping cell division and may kill cancer cells. It is a type of vinca alkaloid and a type of antimitotic agent.