Gemcitabine, known by the brand name Gemzar, is in a type of chemotherapy drug that is considered an antimetabolite. Antimetabolites work by interfering with DNA synthesis and slowing or halting the growth of cancer cells.
Gemcitabine treats many types of cancer, including mesothelioma, breast cancer, ovarian cancer, and bladder cancer. It is usually used in combination with other chemo drugs.