Pharmacology · single question
What is the mechanism of action of naloxone?
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Correct answer: A. ╬╝-opioid receptor antagonist
Naloxone is a competitive ╬╝-opioid receptor antagonist used to reverse opioid overdose (respiratory depression, miosis, sedation). Onset is ~1–2 minutes IV. Flumazenil is the benzodiazepine reversal agent (GABA-A antagonist).