A 72-year-old patient presents with inflammation and fever. Percocet was prescribed but didn't improve symptoms, so their physician increased the dose. Why did the symptoms not resolve?

Correct answer: B. The medication has no anti-inflammatory effect, so it cannot reduce inflammation

• A. Renal impairment can alter drug metabolism but is not the primary reasoning behind this classic teaching point.
• B. Correct. Percocet (oxycodone/acetaminophen) is an analgesic but has essentially no meaningful anti-inflammatory activity, so it would not be expected to resolve a fever/inflammation-driven process — an NSAID or appropriate anti-infective therapy is needed instead.
• C. Opioid dose increases do not cause drug 'resistance' in the way described.
• D. This is not an accurate or established pharmacologic principle.