Pain management and addiction medicine are two specialized fields of medical practice that share a strong common interest in the mechanisms, clinical use, and risks and benefits associated with opioid drugs and other therapies involving potentially abusable medications. In addition to these pharmacological issues, there are profound clinical interactions between the potential of addictive disorders and the occurrence of unrelieved pain that influence both the management of substance use disorders and the care of pain patients. This group of healthcare professionals and policy makers discusses issues at the interface between the fields of pain and chemical dependency and is dedicated to the sharing of a broad range of information about these two fields, including neurobiological linkages, clinical issues, policy concerns, and others.