This second edition of Principles of Toxicology Testingis a must-read for budding toxicologists worldwide. Nationally, toxicology programs have evolved from a traditional understanding of the chemistry and applied toxicity of chemicals and drugs to a more comprehensive understanding of toxicology and toxicology testing as independent entities. Consequently, the second edition starts with basic toxicological principles, including absorption, distribution, metabolism, and elimination of toxins, including chemicals and drugs. The book then continues with animal ( in vivo) and in vitrotoxicology testing methods associated with toxicological analysis and preclinical drug development.