10002329 J Clin Psychiatry / Document Archive

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The article you requested is

Open-Label Tiagabine Monotherapy for Major Depressive Disorder With Anxiety.

J Clin Psychiatry 2006;67:66-71
Copyright 2006 Physicians Postgraduate Press, Inc.

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| 23.23.2.137

Objective: Gamma-aminobutyric acid (GABA) plays a key role in the pathophysiology and treatment of depression and anxiety. Tiagabine, a selective GABA reuptake inhibitor (SGRI) that enhances normal GABA tone, was evaluated for its efficacy and safety in the treatment of depression comorbid with significant anxiety.

Method: In this 8-week, single-center, open-label study, adults with DSM-IV-diagnosed major depressive disorder and significant anxiety (i.e., "anxious depression") received tiagabine monotherapy, initiated at 4 mg/day and titrated for optimum response as tolerated to a maximum dose of 20 mg/day. Symptoms, function, and adverse events were assessed at regular intervals. Patients were entered from April 2002 to February 2003.

Results: Nineteen patients entered the study and 15 met criteria for intent-to-treat analyses. Of those, 6 (40%) discontinued treatment and 9 (60%) completed the 8-week protocol. Tiagabine significantly improved depression, as shown by a reduction in mean ± SD Hamilton Rating Scale for Depression scores from baseline (31.9 ± 6.1) to endpoint (17.0 ± 12.4; p = .002). Categorical response rate was 47% (N = 7). Tiagabine also significantly improved anxiety (Hamilton Rating Scale for Anxiety baseline score of 22.7 ± 4.9 vs. endpoint score of 12.5 ± 8.8; p=.002). The mean±SD final daily dose was 12.8 ± 5.8 mg. The most commonly reported adverse events were dizziness, headache, and gastrointestinal upset/nausea.

Conclusion: These results suggest the potential of the SGRI tiagabine in the treatment of depression with anxiety. Large, placebo-controlled trials are needed.