Clinical pharmacology plays a vital role in drug development to ascertain how the drug affects the human subject. The aim of this book is to discuss some essential researches and advancements in this field through concepts like drug toxicity, therapeutic drugs, clinical trials, pharmacokinetics, etc. In this book, using various studies and examples, constant effort has been made to make the understanding of the different applications of clinical pharmacology in drug development as easy and informative as possible, for the readers.