This book is an optional module within the scope of a European Master Course of study about European perspectives on social inclusion. Written from a European point of view and containing perspectives from Germany, Sweden and Hungary, this book focuses on concepts, theories and research dealing with the social context of drug use; concepts and theories as historically and culturally bound entities, multicultural aspects of different approaches throughout Europe, the introduction of appropriate working methods (prevention and treatment), and the development of a sensitive and human approach to the problems associated with drug use.