Which pupil finding is most consistent with opioid overdose?

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Multiple Choice

Which pupil finding is most consistent with opioid overdose?

Explanation:
Opioids cause miosis, a constricted, pinpoint pupil, due to increased parasympathetic activity in the eye and suppression of sympathetic input. This very small pupil is a classic sign of opioid toxicity, making pinpoint pupils the best indicator among the options. Dilated pupils point to anticholinergic or sympathetic stimulation, normal pupils can occur with other substances or mild cases, and unequal pupils usually signal a neurologic issue rather than opioid overdose. In overdose, you’d also expect decreased mental status and slowed breathing, with naloxone as the reversal agent.

Opioids cause miosis, a constricted, pinpoint pupil, due to increased parasympathetic activity in the eye and suppression of sympathetic input. This very small pupil is a classic sign of opioid toxicity, making pinpoint pupils the best indicator among the options. Dilated pupils point to anticholinergic or sympathetic stimulation, normal pupils can occur with other substances or mild cases, and unequal pupils usually signal a neurologic issue rather than opioid overdose. In overdose, you’d also expect decreased mental status and slowed breathing, with naloxone as the reversal agent.

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