In the past decade, immunomodulatory drugs have been approved by the US Food and Drug Administration for the treatment of multiple myeloma (MM)-and a number of emerging agents that target the cellular pathways or proteins involved in the pathophysiology of MM are currently in development. Lenalidomide (Revlimid) and pomalidomide induce apoptosis and sensitize MM cells while demonstrating superior efficacy and better tolerability than thalidomide (Thalomid).