This book “A Textbook of Pharmacology” written for under-graduate, post-graduate, medical, paramedical and other professionals. This book has replaced the long confusing sentences with short explicit ones, so as to make the reading of the book a pleasurable experience. This book covers overall sixteen chapters, designed in a simple and precise language. To make the book more useful, efficient, and effective; the meaning, features and approaches and other aspects of all the topics have been explain fully. The overall presentation of each chapter in more accessible, informative and comprehensive lucid. It is a unique book discussing principles, objectives and approaches of “Pharmacology”. Great care has been taken to select critically important information and present it in a way that maximizes understanding