This book looks at the latest information on a number of natural toxins, narcotics, and doping agents derived from marine, fungal, microbial, plant and animal origins. It examines the diversity of chemical classes among natural toxins and venoms as well as the biological effect and diverse action of toxicosis from these materials. There is a section on forensic toxicology that details selected synthetic toxins and several chapters on the biological effect of nerve agents such as sarin, which was used on human victims in the 1994 and 1995 subway attacks in Japan.