This book is essential for pharmaceutical, medical, technological and clinical research undergraduate and postgraduate courses. It is one of the essential courses for students of medicine and pharmacy all over the world. This book was written specially keeping in mind the syllabi for Pharmacy, Medical and Nursing students. It is also useful to scientist working in the pharmaceutical industry. In the field of research, no one can accomplish pharmaceutical, medical or clinical research in Vivo or in Vitro article, master or Ph.D. thesis without reading the basics of Biopharmaceutics and pharmacokinetics . Even though, this book is critically essential for any person who needs to understand the scientific basics for the effect of drugs on our body. Finally, we believe that any pharmacist or physician, either clinical, hospital, community, or manufacturing, has to stick to this book in order to obtain the highest outcome of the medicines they prescribe, manufacture or handle. Patients who are looking for getting the best benefit from drugs they administer have to read that book to improve their knowledge.