This paper presents a review of relevant medical and psychological literature that addresses the psychological characteristics of heroin addiction and addicts: dependence (both physical and psychological); explanations of the phenomenon of addiction (both medical and behavioral); and other psychosocial views of causation including escapism,…

This report is based on the results of the National Drug/Alcohol Collaborative Project which examined the prevalence of multiple substance use, particularly the combined use of drug and alcohol. The introductory chapter describes the background and purpose of the project. Chapter Two reviews the literature about multiple substance abuse and…