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  • 1
    ISSN: 1432-2072
    Keywords: Nefazodone ; Paroxetine ; Sleep polysomnogram ; Serotonin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We studied the effect of acute (1 day) and subacute (16 days) administration of the new antidepressant, nefazodone (400 mg daily), and the selective serotonin re-uptake inhibitor (SSRI), paroxetine (30 mg daily), on the sleep polysomnogram of 37 healthy volunteers using a random allocation, double-blind, placebo-controlled design. Compared to placebo, paroxetine lowered rapid eye movement (REM) sleep and increased REM latency. In addition, paroxetine increased awakenings and reduced Actual Sleep Time and Sleep Efficiency. In contrast, nefazodone did not alter REM sleep and had little effect on measures of sleep continuity. We conclude that in contrast to typical SSRIs, nefazodone administration has little effect on sleep architecture in healthy volunteers.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2072
    Keywords: Key words 5-HT1A receptor ; Gepirone ; Paroxetine ; Nefazodone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Animal experimental studies suggest that the therapeutic effect of selective serotonin re-uptake inhibitors (SSRIs) may involve neuroadaptive changes in pre- and post-synaptic serotonin1A (5-HT1A) receptors. We used the endocrine and hypothermic responses to the 5-HT1A receptor agonist, gepirone (20 mg orally), to assess 5-HT1A receptor sensitivity in 37 healthy male volunteers who were studied before and following random double-blind, allocation to treatment with paroxetine, nefazodone or placebo for 17 days. Following antidepressant drug treatment, hypothermic responses to gepirone were markedly decreased by paroxetine but only slightly diminished by nefazodone. Paroxetine also lowered the growth hormone and cortisol responses to gepirone. There was no change in either hypothermic or endocrine response following placebo treatment. Our results suggest that paroxetine treatment produces a striking attenuation of measures of both pre- and post-synaptic 5-HT1A receptor function. Nefazodone appears to decrease the sensitivity of 5-HT1A autoreceptors to some extent and this effect may contribute to its antidepressant activity.
    Type of Medium: Electronic Resource
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