Placebo-Controlled Trial of Venlafaxine for the Treatment of Major Depression

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Abstract
Results are presented of the first double-blind, placebo-controlled trial of a novel antidepressant venlafaxine, which preclinically has demonstrated serotonin, norepinephrine, and dopamine reuptake inhibiting effects. Sixty outpatients meeting DSM-III-R criteria for major depression were randomized to receive 6 weeks of treatment with one of three fixed doses of venlafaxine—25 mg three times a day, 75 mg three times a day, or 125 mg three times a day—or placebo. Significant improvement was observed in depression scores at all doses, with the high dose resulting in earlier improvement, by week 2. For the combined venlafaxine treatment groups, 68% achieved a moderate or marked improvement on the Clinical Global Impression scale, compared with only 31% for the placebo group. Venlafaxine was well tolerated, and nervousness, sweating, and nausea were the only adverse effects observed more frequently with drug compared with placebo.

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