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. 1978 Jul;47(1):200-3.
doi: 10.1210/jcem-47-1-200.

Opiates, prolactin, and the dopamine receptor

Opiates, prolactin, and the dopamine receptor

G Tolis et al. J Clin Endocrinol Metab. 1978 Jul.

Abstract

The administration of a dopamine antagonist, chlorpromazine, and two opiates, morphine and methadone, resulted in a significant rise in serum PRL within 90-150 min. Prior administration of dopamine receptor agonists (apomorphine, levodopa, aand bromocriptine) blocked this effect. In contrast, cyproheptadine, a serotonin antagonist, did not. We suggest that the opiates induce hyperprolactinemia in man via dopamine receptor blockade.

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