Which of the following is NOT a stimulatory effect of opioids on the body?

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Study for the Pain, Opioids, and Neuropsychiatric Pharmacology Test. Explore with flashcards and multiple choice questions; each query comes with hints and explanations. Prepare to excel in your exam!

Multiple Choice

Which of the following is NOT a stimulatory effect of opioids on the body?

Explanation:
Opioids act as CNS depressants and produce several characteristic effects driven by increased parasympathetic tone and reward pathway activation. A hallmark is pupil constriction (miosis), not dilation. They often cause mood changes such as euphoria and commonly induce nausea and vomiting via stimulation of the chemoreceptor trigger zone. Pupil dilation would reflect sympathetic activation and is not an opioid effect, so it is not a stimulatory consequence of opioid use. Therefore, pupil dilation is the not-stimulatory option.

Opioids act as CNS depressants and produce several characteristic effects driven by increased parasympathetic tone and reward pathway activation. A hallmark is pupil constriction (miosis), not dilation. They often cause mood changes such as euphoria and commonly induce nausea and vomiting via stimulation of the chemoreceptor trigger zone. Pupil dilation would reflect sympathetic activation and is not an opioid effect, so it is not a stimulatory consequence of opioid use. Therefore, pupil dilation is the not-stimulatory option.

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