The evolution in our understanding of opioid receptors and their subtypes is in- mately linked to the development of new pharmacological treatments for diseases/ disorders as diverse as addiction, self-injurious behavior, pain, cancer, infl- mation, eating disorders, traumatic injury, pruritis, and movement disorders. These potential treatments involve both novel chemical entities and classic opioid antagonists with improved drug delivery systems. The contributions contained in Opioid Receptors and Antagonists: From Bench to Clinic represent the efforts from some of the leading international...