Used primarily in cancer chemotherapy, particularly for the treatment of acute lymphoblastic leukemia and Hodgkin’s lymphoma. It works by inhibiting microtubule formation in dividing cells, thereby preventing cell division and promoting apoptosis in rapidly growing tumor cells. Commonly administered intravenously, it is part of multi-drug regimens due to its potent cytotoxic effects. Also used in some solid tumors and neurological cancers, though its use is limited by neurotoxic side effects.