Which study analyzes drug absorption, distribution, metabolism, and excretion?

• A. Pharmacodynamics
• B. Pharmacokinetics
• C. Medication Profile
• D. Anaphylaxis

Answer: (B)

Pharmacokinetics describes how a drug is absorbed, distributed, metabolized, and eliminated from the body. This field tracks the fate of a drug from administration to clearance, and each step shapes how quickly it acts, how long its effects last, and how much exposure the tissues receive. Absorption determines how fast the drug enters the bloodstream; distribution describes how it spreads through body tissues; metabolism usually in the liver converts the drug into metabolites; excretion removes the drug and metabolites, often through the kidneys. Understanding these processes helps predict onset and duration of effect, appropriate dosing intervals, and potential drug interactions. Pharmacodynamics, by contrast, is about what the drug does to the body (effects and mechanism), not how the body handles the drug. A medication profile isn’t a standard pharmacology term, and anaphylaxis is a severe allergic reaction, not a study of drug handling.