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Pharmacology is the study of how medications and other chemical substances interact with living organisms to produce a change in function. It encompasses the identification, isolation, and characterization of drugs and their mechanisms of action, as well as the concepts and principles underlying their use in therapy. As a subfield of medical books, pharmacology focuses on the application of this knowledge to the prevention, diagnosis, and treatment of disease. This includes understanding the effects of drugs on various organ systems, as well as the factors that influence drug absorption, distribution, metabolism, and excretion. Pharmacology also has close ties to other branches of biology and health books, including physiology, pathophysiology, and toxicology. By elucidating the molecular and cellular mechanisms underlying drug action, pharmacologists contribute to our understanding of basic biological processes and help to inform the development of new therapeutic strategies. Overall, pharmacology represents a critical area of study within medical books, providing essential knowledge and tools for healthcare professionals and researchers alike.