What drugs to take for chemotherapy for leukemia is based on the different types of leukemia. Common chemotherapeutic drugs include cyclophosphamide, all-trans retinoic acid with arsenic, chloropicrin phenylbutyrate, leucovorin, etc. However, leukemia chemotherapy is more commonly administered by intravenous drug infusion. 1. Cyclophosphamide: It is suitable for all types of leukemia and is one of the main drugs used in the treatment of lymphoblastic leukemia, and is also used as the main drug in the pretreatment of bone marrow transplantation. The common side effect is hemorrhagic cystitis, which should be prevented by drinking more water and applying alkaline drugs (sodium bicarbonate tablets) during the period of administration. 2. All-trans retinoic acid and arsenic: applied to acute promyelocytic leukemia, the combination of the two can cure most of the acute promyelocytic leukemia. 3. Chloropicrin phenylbutyrate: mainly used in the treatment of chronic lymphocytic leukemia. The main side effect is bone marrow suppression, but to a lesser extent. If used for a long time or in large doses, it can also lead to severe bone marrow suppression, so check the blood picture regularly during the use of the drug. Nausea, vomiting and other gastrointestinal reactions are mild. 4. Leucovorin: mainly used for chronic granulocytic leukemia, oral absorption is good, but it is ineffective in the accelerated and acute phase of the disease. It is also often used as a pretreatment drug for bone marrow transplantation. There are other drugs for chemotherapy for leukemia, and more importantly, the use of intravenous drugs, such as cytarabine, Zoerythromycin, etc. It is recommended to choose the corresponding drugs for chemotherapy under the guidance of a doctor according to specific typing. The above medications need to be used under the guidance of a doctor.