Last updated 1/26/25
Imagine this: EMS administers naloxone to a patient found unresponsive from a suspected opioid overdose. By the time they arrive at your ED, they’re awake, alert, and demanding to leave—refusing further care, despite your offers to manage withdrawal. You’re left wondering: Is it truly safe to let them walk out the door?”
Traditional teaching recommends observing patients for at least 4 hours after administering naloxone for opioid overdose. This observation period is intended to monitor for potential recurrence of opioid toxicity, given that naloxone's half-life is shorter than that of many opioids. However recent literature has explored shorter periods.
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Willman et al 2016 - A Systematic Review
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The HOUR Trial - 2018
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Heaton et al 2019 - 2 hr observation
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Conclusion
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Sources
This post is for education only and not medical advice.