A phase III study (DASISION) of Dasatinib vs. Imatinib could proof that Dasatinib induced significantly higher and faster rates of complete cytogenetic response and major molecular response when compared to Imatinib. Since achieving complete cytogenetic response within 12 months has been associated with better long-term, progression-free survival, Dasatinib may improve the long-term outcomes among patients with newly diagnosed chronic-phase CML.