Caring for clients who are experiencing problems with alcohol or drugs is an increasingly important issue for health and social care professionals. This book guides the reader through the nature of substance use and chemical dependency, covering the physical, psychological, sociological and practical aspects of both legal and illegal substance use. Drink, Drugs and Dependence provides students and practitioners with scientifically-based information on practical issues. It covers: - public health and policy issues - legal substances such as alcohol and tobacco - illegal drugs: effects of dependence, approaches to treatment - future developments. Woody Caan is a Public Health Specialist in Research an Development and Honorary Senior Lecturer at the International Centre for Health and Society, University College London. Jackie de Belleroche is Professor of Neurochemistry at the Imperial College School of Medicine, Charing Cross Hospital