Pharmacogenetics studies how genetic makeup variations correlate with responses to a specific medication.

• A. Study of how genetic makeup variations correlate with responses to a medication
• B. Study of how drug prices influence access
• C. Study of environmental factors on drug metabolism
• D. Study of marketing strategies for medications

Answer: (B)

Pharmacogenetics focuses on how genetic differences among individuals influence their responses to medications. This means variations in genes for drug-metabolizing enzymes, targets, and transporters can change how well a drug works or the risk of adverse effects, guiding personalized dosing and safer choices. The description describing this exact relationship—genetic makeup variations correlating with medication responses—fits pharmacogenetics perfectly.

In contrast, topics about how drug prices affect access relate to pharmacoeconomics, environmental factors on metabolism concern non-genetic influences on how drugs are processed, and marketing strategies deal with the business side of medications. Understanding the gene-driven differences in drug response is what makes pharmacogenetics distinct.