Which of the following is an example of a drug classification category?

• A. Dermatologic Drugs
• B. Central Nervous System Drugs
• C. Herbal Supplements
• D. Diagnostic Radiology Drugs

Answer: (B)

Grouping drugs by the body system they affect is a common way to classify medications. An example of this type of category is drugs that act on the central nervous system, since they include all medicines that influence the brain and spinal cord, such as sedatives, stimulants, anticonvulsants, and analgesics with CNS activity. This label provides a clear, practical way to organize medications because it directly ties each drug to its primary physiological target, guiding expectations about effects, monitoring, and interactions.

The other options describe different kinds of drug-related groups but don’t serve as the same clear system-based category. Herbal supplements, for instance, aren’t treated as a uniform pharmacologic class because they are diverse substances with variable regulation and effects. Diagnostic radiology drugs refer to imaging agents used in diagnostic tests rather than a broad, system-focused drug class. Dermatologic drugs describe skin-directed therapies and represent a domain of use rather than a single, standard classification by bodily system.