What is the typical duration of acetaminophen's analgesic/antipyretic effect?

What is the typical duration of acetaminophen's analgesic/antipyretic effect?

• A. 8-12 hours
• B. 24 hours
• C. 1-2 hours
• D. 4-6 hours

Answer: (D)

The effect duration reflects how long the drug continues to relieve pain and fever after a dose. Acetaminophen typically provides analgesic and antipyretic relief for about 4–6 hours, which is why dosing is usually every 4–6 hours as needed (within the daily limit). Shorter time frames like 1–2 hours describe onset rather than duration, while longer durations such as 8–12 or 24 hours exceed what a single dose generally provides.

The effect duration reflects how long the drug continues to relieve pain and fever after a dose. Acetaminophen typically provides analgesic and antipyretic relief for about 4–6 hours, which is why dosing is usually every 4–6 hours as needed (within the daily limit). Shorter time frames like 1–2 hours describe onset rather than duration, while longer durations such as 8–12 or 24 hours exceed what a single dose generally provides.