What was the first drug to switch from Rx to OTC in 1984?

• A. Ibuprofen
• B. Acetaminophen
• C. Diphenhydramine
• D. Loperamide

Answer: (A)

The main idea here is understanding how a prescription drug becomes available for self-care as an over-the-counter option. For a drug to switch from Rx to OTC, regulators look for a strong safety profile, clear dosing, and labeling that allows consumers to use it correctly without a clinician’s supervision.

Ibuprofen was the first drug to make this transition, gaining OTC status in 1984. This move reflected that people could safely use it for common pains and fever when given straightforward dosing instructions and warnings. Its introduction as an OTC option provided a new non-aspirin NSAID choice for self-care and helped set the precedent for future OTC switches.

The other drugs listed did not inaugurate the Rx-to-OTC switch in 1984, as they either had established OTC availability earlier or did not achieve the first switch at that time.