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Riluzole in Augmentation of Fluvoxamine for Moderate to Severe Obsessive–Compulsive Disorder: Randomized, Double-Blind, Placebo-Controlled Study Publisher Pubmed



Emamzadehfard S1 ; Kamaloo A1 ; Paydary K1 ; Ahmadipour A1 ; Zeinoddini A1 ; Ghaleiha A2 ; Mohammadinejad P1 ; Zeinoddini A1 ; Akhondzadeh S1
Authors
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Authors Affiliations
  1. 1. Psychiatric Research Center, Roozbeh Psychiatric Hospital, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Behavioral Disorders and Substance Abuse Research Center, Hamadan University of Medical Sciences, Hamadan, Iran

Source: Psychiatry and Clinical Neurosciences Published:2016


Abstract

Aim: The aim of the present randomized, double-blind, placebo-controlled, 8-week trial was to assess the efficacy and tolerability of riluzole augmentation of fluvoxamine in treatment of patients with moderate to severe obsessive–compulsive disorder. Methods: Patients were randomized into two parallel groups to receive fluvoxamine plus placebo or fluvoxamine plus riluzole (50 mg twice daily). All patients, regardless of their treatment group, received fluvoxamine at 100 mg/day for the initial 4 weeks of the study followed by 200 mg/day of fluvoxamine for the rest of the trial course. A total of 50 patients (25 in each group) were evaluated for response to treatment using the Yale–Brown Obsessive Compulsive Scale (Y-BOCS) at baseline and at weeks 4, 8 and 10. Side-effects were recorded using predesigned checklists in each visit. Repeated-measure analysis of variance showed a significant effect for time × treatment interaction in the Y-BOCS total score and a significant effect for time × treatment interaction in the Y-BOCS Compulsive subscale score between the two groups. Results: Repeated-measure analysis of variance showed a significant effect for time × treatment interaction (Greenhouse–Geisser corrected: F = 4.07, d.f. = 1.22, P = 0.04) in the Y-BOCS total score and a significant effect for time × treatment interaction (Greenhouse–Geisser corrected: F = 4.45, d.f. = 1.33, P = 0.028) in the Y-BOCS Compulsive subscale score between the two groups. Riluzole augmentation therapy demonstrated higher, partial or complete treatment response according to the Y-BOCS total scores. Conclusion: Riluzole may be of clinical use as an adjuvant agent to fluvoxamine in treatment of moderate to severe obsessive–compulsive disorder. © 2016 The Authors. Psychiatry and Clinical Neurosciences © 2016 Japanese Society of Psychiatry and Neurology
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