ARA-C A drug used with other drugs to treat acute lymphoblastic leukemia (ALL) , acute myeloid leukemia (AML) , and chronic myeloid leukemia (CML) . It is also used to prevent and treat a type of leukemia that has spread to the meninges (three thin layers of tissue that cover and protect the brain and spinal cord) . It is also being studied in the treatment of other types of cancer. ARA-C blocks cells from making DNA and may kill cancer cells. It is a type of antimetabolite. Also called cytarabine.