A Double-Blind Placebo-Controlled Study of Controlled Release Fluvoxamine for the Treatment of Generalized Social Anxiety Disorder

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Abstract

This was a randomized double-blind placebo-controlled multicenter study to assess the efficacy, safety, and tolerability of fluvoxamine in a controlled release (CR) formulation for treatment of generalized social anxiety disorder (GSAD). A total of 300 subjects with GSAD were randomly assigned to receive either fluvoxamine CR (N = 149) or placebo (N = 151) for 12 weeks. Mean changes from baseline to end point in Liebowitz Social Anxiety Scale (LSAS), Clinical Global Impression Severity of Illness Scale (CGI-S), Sheehan Disability Scale (SDS), as well as the mean end point scores in Clinical Global Impression Improvement Scale (CGI-I) and Patient Global Impression of Improvement Scale (PGI) were compared between the fluvoxamine CR and placebo treatment groups. Arizona Sexual Experience Scale (ASEX), adverse event, and other safety parameters were also assessed. The results demonstrated that fluvoxamine CR was significantly superior to placebo in decreasing LSAS total score (primary measure) starting at week 4. At end point, there was a mean change from baseline of −36.1 ± 2.7 (37% reduction) in the LSAS total score in the fluvoxamine CR group compared with −27.3 ± 2.4 (28% reduction) in the placebo group (P = 0.020 for mean change). Fluvoxamine CR was also significantly superior to placebo in SDS, CGI-S, CGI-I at end point (secondary measures). When compared with placebo, fluvoxamine CR did not cause any significant weight gain or clinically significant sexual dysfunction as measured by ASEX. In summary, fluvoxamine CR is an efficacious, safe, and well-tolerated treatment of generalized social anxiety disorder.

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