Which of the following is an example of drug classification?

• A. Anatomical, therapeutic use, pharmacological mechanism, chemical group, and generic name/chemical substance
• B. Brand names, generic names, and chemical composition
• C. Route of administration, dosage form, and schedule
• D. Color coding and packaging

Answer: (A)

Understanding how drugs are organized helps you see how different medicines relate to each other. Drug classification uses systematic axes like anatomical site of action, therapeutic use (indication), pharmacological mechanism (how the drug works), chemical group (chemical family), and the generic name/chemical substance (reflecting structure and standard naming). This multifaceted approach is exactly what the best option lists, showing categories that pharmacists and clinicians use to group and compare drugs across where they act, what they treat, and how they work, while also aligning with chemical naming.

The other options focus on aspects that aren’t classifications themselves. Brand names, generic names, and chemical composition concern naming and composition rather than organizing drugs into a taxonomy. Route of administration, dosage form, and schedule relate to how a drug is used or regulated, not how drugs are categorized. Color coding and packaging pertain to labeling and safety rather than taxonomy.