The book "Fundamentals of Pharmacovigilance" provides a thorough overview of many facets of pharmacovigilance, including the necessity of ADR reporting methods, data mining, postmarketing surveillance, and laws in various countries, among other things. Modern medications can not only prevent and treat diseases, but they can also cause negative side effects (ADRs). Adverse drug responses (ADRs) are classified and their causes, mechanisms, and interactions are thoroughly addressed. This book aims to effectively compile all the theoretical components of pharmacovigilance. This book's first chapter explains the fundamental terms linked to pharmacovigilance. The discussion of historical perspectives, needs and aims, and modern pharmacovigilance methodologies continues in further chapters. Healthcare professionals, postgraduate students, business executives, and individuals working in clinical research in academia and the pharmaceutical industry would all benefit from this book.