There is no such thing as which is more effective, Zorubicin or Cytarabine. Usually the two can be combined to treat leukemia, and cytarabine can also treat malignant tumors. Zoerythromycin belongs to anthracycline antitumor antibiotic drugs, which can play a role in hindering cell synthesis, so that it directly binds to DNA, and cytarabine belongs to pyrimidine antimetabolic antitumor drugs, which inhibit the synthesis of cellular DNA, interfering with the role of cell proliferation. There is no comparability between these two drugs, so there is no such thing as which is more effective, Zoerythromycin or Cytarabine. Zoerythromycin and cytarabine are usually used in combination in clinic, mainly for the treatment of leukemia, such as acute myeloid leukemia, acute lymphoblastic leukemia, chronic granulocytic leukemia and so on. Besides, cytarabine can also treat malignant tumors. All in all, patients must actively cooperate with doctors to use Zoerythromycin and Cytarabine, and follow up on time, so that doctors can easily understand the effect of treatment.