Monitoring human exposure to drugs and chemicals via measurement of the agents themselves, their biotransformation products or their biomarkers in biological specimens has never held more significance than it does today. The numerous applications of such appraisals include therapeutic drug monitoring, emergency toxicology, employee drug screening, clinical diagnosis of disease, industrial chemical exposure, assessment of ecocontaminant absorption, drug-facilitated sexual assault, criminal poisoning and investigation of sudden or unexpected death. This book is dedicated to providing the essential information needed to launch a search for suspect agents by delineating the fate in the human body of the most commonly encountered substances. In this current edition,