The area of study that focuses on the effects of drugs on the body is called "pharmacology." This scientific discipline examines how drugs interact with biological systems, including their mechanisms of action, therapeutic effects, side effects, and potential for addiction. Pharmacologists study various substances, including prescription medications, over-the-counter drugs, and recreational substances, to understand their efficacy and safety. The field is critical for the development of new medications and treatment protocols in healthcare. Through pharmacology, researchers aim to improve drug design, optimize treatment regimens, and minimize adverse reactions, ultimately enhancing patient care.