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Pharmacology · single question

NSAIDs have a ceiling analgesic effect. What does this mean clinically?

  1. NSAIDs become toxic at high doses
  2. NSAIDs should not be taken for more than 3 days
  3. NSAIDs cause rebound pain when stopped
  4. Beyond a certain dose, increasing the NSAID dose provides no additional pain relief
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Correct answer: D. Beyond a certain dose, increasing the NSAID dose provides no additional pain relief

The ceiling analgesic effect of NSAIDs means that beyond a certain dose threshold, increasing the dose does NOT provide additional pain relief — though side effects (GI, renal, cardiovascular) continue to increase with dose. This is clinically important: prescribing more than the ceiling dose of ibuprofen (typically 400–600 mg) for analgesia provides no additional benefit, only more risk. Opioids do not have a ceiling analgesic effect.
  • A. ❌ Toxicity is a separate concern — the ceiling analgesic effect specifically refers to the analgesic plateau, not toxicity threshold.
  • B. ❌ A maximum 3-day limit is not the definition of ceiling analgesic effect — that is a prescribing guideline for acute pain.
  • C. ❌ Rebound pain (opioid hyperalgesia) is associated with opioids, not NSAIDs.
  • D. ✅ CORRECT – Ceiling effect: there is a maximum analgesic dose above which no additional pain relief is obtained. Extra NSAID dose only adds side effects, not analgesia.

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