This comprehensive text provides clear explanations of the effects of drugs on human performance and the need for workplace drug testing. Case studies of successful programmes are included as well as how different countries test for drugs. It provides essential information on: the regulatory and legal frameworks around the world, how to set policies and coverage of all aspects of drug analysis, and the associated interpretation of results. Written by internationally acknowledged experts this informative book is essential reading for anyone interested in workplace drug testing or setting up such a system including clinical and forensic toxicologists, occupational health physicians, nurses, human resources, drug counselling and treatment providers, analytical chemists and lawyers.