Clinically demonstrated efficacy of Melphalan and Prednisone in MM subjects as well as the confirmed inhibitory effect of dasatinib on several tyrosine kinase receptors and pathways implicated in the pathophysiology of MM. Additionally, as a SRC inhibitor, dasatinib plays an important role on bone metabolism through inhibition of osteoclast-mediated bone resorption in vitro. Dasatinib could, thus, be beneficial on bone density of patients on study, through blockage of osteolysis and control of bone lesions.