The effect of clonidine and bright light on plasma melatonin

We studied the effect of α2-adrenoceptor agonist, clonidine, and bright artificial light (> 2500 lux) on the nocturnal increase in plasma melatonin in normal subjects. Clonidine (1.5 μg/kg, intravenously) was without effect on plasma melatonin concentration. In contrast, bright light treatmen...

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Bibliographic Details
Main Authors: Grasby, P, Cowen, P
Format: Journal article
Language:English
Published: 1988
Description
Summary:We studied the effect of α2-adrenoceptor agonist, clonidine, and bright artificial light (> 2500 lux) on the nocturnal increase in plasma melatonin in normal subjects. Clonidine (1.5 μg/kg, intravenously) was without effect on plasma melatonin concentration. In contrast, bright light treatment abolished the increase in night-time melatonin. Bright light is a simple and effective means of altering melatonin secretion in humans.