In the rapidly evolving field of pharmaceutical sciences, the study of biopharmaceutics and pharmacokinetics plays a pivotal role in bridging the gap between drug formulation and therapeutic efficacy. Biopharmaceutics and Pharmacokinetics is crafted with the intent to provide a comprehensive and insightful exploration of these fundamental concepts, guiding students, researchers, and practitioners alike through the complexities of drug absorption, distribution, metabolism, and excretion. Authored by a distinguished team of experts—Mr. Arijit Mallick, Dr. Pankaj Mohan Pimpalshende, Ms. Rajmane Ragini B., and Dr. A. Rajesh—this book aims to address the ever-growing need for a detailed and accessible resource in this vital area of study. Each chapter is meticulously designed to cover the essential principles and emerging trends in biopharmaceutics and pharmacokinetics, offering a thorough understanding of how these concepts influence drug development and therapeutic strategies. The journey through this book begins with an exploration of the fundamental principles of drug absorption and bioavailability, progressing through detailed discussions on the pharmacokinetic models used to predict drug behavior in the body. The text further delves into the practical aspects of these theories, including the application of biopharmaceutics and pharmacokinetics in drug formulation and individualized therapy. In crafting this work, our goal was to integrate theory with practical insights, supported by current research and real-world examples. We have endeavored to present complex information in a clear and engaging manner, making it accessible to both newcomers and seasoned professionals in the field. The book also includes a variety of case studies, practical exercises, and review questions to enhance the learning experience and encourage critical thinking. We are grateful to our colleagues, students, and the broader academic community for their support and contributions, which have greatly enriched this endeavor.