Article2001

Paroxetine in the Treatment of Generalized Anxiety Disorder

Mark H. Pollack · Rocco Zaninelli · Andrew W. Goddard · James P. McCafferty · Kevin M. Bellew · Daniel B. Burnham +1 more

246 citations0/0 files storedThe Journal of Clinical Psychiatry

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Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes Mental Health Treatment and Access Treatment of Major Depression

Abstract

BACKGROUND: The objective of this randomized, double-blind, placebo-controlled study was to investigate the efficacy and safety of paroxetine in outpatients with generalized anxiety disorder (GAD). METHOD: Male and female outpatients 18 years and older who met DSM-IV criteria for GAD and had baseline scores of at least 20 on the Hamilton Rating Scale for Anxiety (HAM-A) were randomly assigned to treatment with paroxetine (20-50 mg/day) or placebo for 8 weeks. The primary efficacy variable was the mean change from baseline in the total score of the HAM-A. Additional key efficacy variables were the change from baseline in the scores of the HAM-A items anxious mood and tension, the anxiety subscale of the Hospital Anxiety and Depression Scale, and the Sheehan Disability Scale (SDS). The proportions of patients fulfilling response and remission criteria at week 8 were also determined. RESULTS: The intent-to-treat population included 324 patients. At week 8, compared with the placebo group (N = 163), the paroxetine group (N = 161) had a significantly greater reduction of GAD symptoms on all of the above-mentioned efficacy variables. On the HAM-A anxious mood item, which encompasses the cardinal symptoms of GAD, significantly greater efficacy was observed from week 1 and on the SDS significantly greater improvement was documented in the domain "social life" as early as week 4 for paroxetine compared with placebo. In both the last-observation-carried-forward and completer data sets, significantly greater proportions of paroxetine-treated patients achieved response or remission by week 8. Treatment with paroxetine was well tolerated, and the number and type of adverse events recorded in the paroxetine group correspond to the known safety profile of this medication. CONCLUSION: Paroxetine in doses of 20 to 50 mg once daily is effective in the treatment of patients with GAD. Improvement of core symptoms of GAD occurs early and is associated with significant reduction in disability after only 8 weeks of treatment.

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