This book provides a comprehensive, receptor-oriented exploration of drug action at the molecular and cellular levels. Beginning with fundamental principles of receptor pharmacodynamics, it systematically examines a wide spectrum of clinically and experimentally important receptor systems, including G protein-coupled receptors, ion channels, enzyme-linked receptors, nuclear receptors, and emerging receptor targets.Each chapter integrates receptor classification, signaling mechanisms, pharmacological actions, therapeutic indications, contraindications, and clinical relevance, offering a balanced blend of theory and application. With dedicated coverage of receptors such as adenosine, adrenergic, angiotensin, apelin, bile acid, cannabinoid, chemokine, calcium sensing, and several neuro and immunopharmacological receptors, this textbook reflects the contemporary scope of receptor science.Written by experienced pharmacology academicians and researchers, the book is designed to support undergraduate and postgraduate education while also serving as a practical reference for researchers and professionals. Its structured presentation and emphasis on translational relevance make it an essential resource for understanding receptor-based therapeutics in modern pharmacology.
