Pharmacokinetics studies how the body handles the drug.

• A. What the body does to the drug
• B. What the body handles the drug
• C. How the body handles the drug
• D. How the drug is manufactured

Answer: (A)

Pharmacokinetics describes what the body does to a drug—its absorption, distribution, metabolism, and excretion (ADME). This fate of the drug in the body determines how quickly it acts, how strong its effect is, and how long it lasts. The option that states “What the body does to the drug” captures this idea precisely. The other phrasings are vague or unrelated: “How the drug is manufactured” falls outside pharmacokinetics, and the wording about how the body handles the drug is less specific about the body's actions on the drug itself. (For contrast, pharmacodynamics covers what the drug does to the body, not what the body does to the drug.)