What is the primary focus of the study of pharmacology?

The primary focus of pharmacology is to understand the effects of drugs on biological systems. This encompasses studying how drugs interact with the body, including their mechanisms of action, therapeutic effects, side effects, and pharmacokinetics—how drugs are absorbed, distributed, metabolized, and excreted. This foundational knowledge is crucial for healthcare professionals to ensure safe and effective use of medications in patient care. Understanding pharmacology enables practitioners to make informed decisions about drug therapies, recognize potential interactions, and provide appropriate patient education regarding medication use. Other options, while important in the broader context of healthcare, do not capture the core essence of pharmacology, which is centered on drug interactions and their physiological impacts.