Toxicology is a discipline, overlapping with biology, chemistry, pharmacology, and medicine, thatinvolves the study of the adverse effects of chemical substances on living organisms and the practice ofdiagnosing and treating exposures to toxins and toxicants. The relationship between dose and itseffects on the exposed organism is of high significance in toxicology. Factors that influence chemicaltoxicity include the dosage (and whether it is acute or chronic), route of exposure, species, age, sex, andenvironment. The book contains different chapters based on the original research work by eminentacademicians and scientists. Scientists and students actively engaged in this field will find this book fullof crucial and unexplored concepts. It is our hope that this book will give a thorough knowledge of thisfield.