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A Comparison of Nefazodone and Fluoxetine on Mood and on Objective, Subjective, and Clinician-Rated Measures of Sleep in Depressed Patients: A Double-Blind, 8-Week Clinical Trial

J Clin Psychiatry 1997;58:185-192

Background: Previous small trials have suggested that nefazodone does not suppress rapid-eye-movement (REM) sleep or increase REM latency in depressed patients, in contrast to fluoxetine. The effects of nefazodone and fluoxetine on sleep architecture and on clinician- and patient-rated sleep measures were directly compared in this 8-week, multicenter, double-blind, randomized, parallel-group study.

Method: Forty-four outpatients with moderate to severe, nonpsychotic major depressive disorder (DSM-III-R) and insomnia were randomly assigned to receive nefazodone (Days 1_7, 200 mg/day; Days 8_56, 400 mg/day) or fluoxetine (Days 1_56, 20 mg/day). Sleep measures were obtained at baseline, while patients were unmedicated, and at Weeks 2, 4, and 8 of treatment.

Results: In 43 evaluable patients (23 nefazodone, 20 fluoxetine), nefazodone and fluoxetine demonstrated similar antidepressant efficacy. All significant values were p

Conclusion: While nefazodone and fluoxetine showed equivalent antidepressant efficacy, more objective, subjective, and clinician-rated measures of sleep disturbance were improved during treatment with nefazodone than with fluoxetine. These results suggest that antidepressant effects of medications can occur independently of drug-induced changes in objective, subjective, and clinician-rated measures of sleep. Further studies, including parallel placebo-controlled comparisons with nefazodone, are needed to further test this hypothesis.