- The induction phase of therapy lasts for about one month and its purpose is to kill all detectable leukemia cells. Patients in both groups will receive the following medication: prednisone, vincristine, doxorubicin, methotrexate, leucovorin, asparaginase, cytarabine (ARA-C), and hydrocortisone. Patients in the "Hight Risk" group will also receive dexrazoxane.