Pharmacology is the scientific study of how drugs and substances interact with living organisms, including humans, animals, and even microorganisms. It involves understanding how drugs are absorbed, distributed, metabolized, and excreted by the body, as well as how they produce their effects on various biological systems. Pharmacologists study the mechanisms of action of drugs, their therapeutic uses, potential side effects, and interactions with other substances. This field plays a crucial role in developing new medications, ensuring drug safety, and optimizing drug therapies for various medical conditions.