In recent decades, advances in cellular and molecular biology have significantly transformed pharmacology, enhancing our understanding of drug mechanisms and enabling innovative therapeutic strategies targeting diseases at cellular and molecular levels. The book "Cellular and Molecular Pharmacology" provides a comprehensive resource for students, researchers, and practitioners. Pharmacology traditionally focused on drug interactions with biological systems, but modern techniques now emphasize cellular interactions with receptors, enzymes, ion channels, and signaling molecules. This book aims to bridge classical pharmacology with contemporary molecular insights, integrating fundamental principles with recent research, exploring cellular mechanisms, molecular pathways in disease, and cutting-edge drug discovery technologies.