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  • Title: A double blind comparison of venlafaxine and paroxetine in obsessive-compulsive disorder.
    Author: Denys D, van der Wee N, van Megen HJ, Westenberg HG.
    Journal: J Clin Psychopharmacol; 2003 Dec; 23(6):568-75. PubMed ID: 14624187.
    Abstract:
    While the usefulness of clomipramine and selective serotonin reuptake inhibitors (SSRIs) in obsessive-compulsive disorder (OCD) has been established, the efficacy of serotonin-norepinephrine reuptake inhibitors remains to be determined. This report describes the first randomized double-blind comparison study of an SNRI in patients with obsessive-compulsive disorder. The current study compares the efficacy and tolerability of venlafaxine with paroxetine. One hundred and fifty patients with primary OCD according to DSM-IV criteria were randomly assigned in a 12-week double-blind trial to receive dosages titrated upward to 300 mg/d of venlafaxine (n = 75) or 60 mg/d of paroxetine (n = 75). Primary efficacy was assessed by the change from baseline on the Yale-Brown obsessive-compulsive scale (Y-BOCS). Other assessments throughout the trial included the Hamilton depression rating scale, and the Hamilton anxiety rating scale. An intent-to-treat, last-observation-carried-forward analysis demonstrated a mean decrease on the Y-BOCS of 7.2 +/- 7.5 in the venlafaxine group and of 7.8 +/- 5.4 in the paroxetine group. In both treatment groups, a responder rate (decrease > 35% on the Y-BOCS) of approximately 40% was found. There were no significant differences between venlafaxine and paroxetine with regard to response or responder rates. The incidence of adverse events for venlafaxine and paroxetine was comparable. The most common side effects for venlafaxine were somnolence, insomnia, a dry mouth, and sweating; and for paroxetine somnolence, sweating, nausea, and headache. These results show that venlafaxine was equally effective to paroxetine in treating patients with OCD. Venlafaxine may be a useful therapy for obsessive-compulsive patients, but is not superior to SSRIs.
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