This book focuses on Drug Discovery and Clinical Research. The pharmaceutical industry is one of the largest and most rapidly expanding industries in the world. The Drug Discovery and Clinical Research bandwagon has been joined by scientists and researchers from all fields including basic sciences, medical sciences, biophysicists, biotechnologists, statisticians, regulatory officials and many more. The joint effort and contribution from all is translating into the fast development of this multifaceted field. This book consists of 4 sections that include drug discovery and development, basic principles of clinical research, pharmacovigilance, and annexures, which are further divided into 20 chapters. Each of the chapter dealt here starting from drug discovery and development, clinical development, bioethics, medical devices, pharmacovigilance, data management, safety monitoring, patient recruitment, etc. are topics for full-fledged book in themselves. This book will contribute to the growth of readers, which should translate into drug discovery and clinical research industry’s growth.