KEY FEATURES: REVISION OF A BESTSELLER previous edition published in 2002 and sold 6,000 copies. The new, Fifth Edition provides the critical updates toxicologists need to keep up with the changing times. NEW INFORMATION on over-the-counter preparations, lactation, and occupational toxicology, providing clarity and insight into a rapidly evolving subject COMPREHENSIVE includes in-depth coverage of the most important topics, such as the patterns of chemicals, harmful effects of chemicals, and risk assessment, giving toxicologists the necessary tools to enhance their practice EXPERT EDITORSHIP Drs. Lu and Kacew offer a distillation of decades and research and teaching experience in toxicology, providing authoritative guidance for both students and practicing professionals PRACTICAL, EASY-TO-READ INFORMATION AT YOUR FINGERTIPS organized into four key sections and including separate subject and chemical indexes, this a useful, quick shelf reference for the more experienced researcher