- Patients treated previously with 5-azacytidine, decitabine, thalidomide, revlimid, amifostine, hydroxyurea, Histone deacytlase inhibitors and arsenic trioxide are allowed. Prior treatment with cytokines (i.e., interferon, interleukin), colony stimulating factors, or hydroxyurea is also permitted. Patients should be 28 days off prior treatment.