What is the most authoritative source to consult to learn more about a specific medication?

Correct answer: D. The official prescribing information / manufacturer (package insert)

• A. Incorrect – unverified web pages are not reliable; only official sources are.
• B. Incorrect. A single journal article may be useful but is not the most authoritative, comprehensive source for a specific drug; the FDA-approved prescribing information/package insert is.
• C. Incorrect – textbooks lag behind label updates and recalls.
• D. Correct – the FDA-approved package insert / official manufacturer information is the definitive, up-to-date source for indications, dosing, interactions and adverse effects. (A pharmacist is also an excellent live resource.)