What is a distinguishing feature of opioid intoxication?

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Multiple Choice

What is a distinguishing feature of opioid intoxication?

Explanation:
Opioid intoxication most characteristically presents with miosis, or pinpoint pupils. This occurs because mu-opioid receptor activation increases parasympathetic activity to the pupil, constricting the iris. It’s a classic sign that helps distinguish opioid overdose from substances that cause pupil dilation. Other features can include slowed respiration and sedation, but tachycardia and hypertension are not typical of opioid toxicity and may occur with stimulant use or withdrawal. Therefore, pinpoint pupils are the distinguishing feature.

Opioid intoxication most characteristically presents with miosis, or pinpoint pupils. This occurs because mu-opioid receptor activation increases parasympathetic activity to the pupil, constricting the iris. It’s a classic sign that helps distinguish opioid overdose from substances that cause pupil dilation. Other features can include slowed respiration and sedation, but tachycardia and hypertension are not typical of opioid toxicity and may occur with stimulant use or withdrawal. Therefore, pinpoint pupils are the distinguishing feature.

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