A placebo-controlled cross-over trial of adjunctive EPA in OCD.
Several clinical studies showed beneficial effects of omega-3 fatty acids in major affective disorders, including resistant depression. Some antidepressants are also effective, albeit less so, in obsessive-compulsive disorder (OCD). We therefore undertook a preliminary placebo-controlled cross-over trial of adjunctive eicosapentaenoic acid (EPA) in OCD. Eleven patients with current obsessive-compulsive disorder, who were on a stable maximally tolerated dose of SSRI with no further improvement over at least the last two months, were recruited. Subjects were randomly allocated to begin 6 weeks of placebo (2 g liquid paraffin per day) followed by 6 weeks of 2 g of EPA or EPA followed by placebo. Patients continued their prior SSRIs at the same dose. Assessments were performed with the Yale-Brown Obsessive-Compulsive Scale (YBOCS), and the Hamilton Rating Scales for depression (HAM-D) and anxiety (HAM-A). There were no effects of order of treatment. Time had a main effect of YBOCS scores; mean scores declined from 26.0 (+/-5) to 17.6 (+/-6) by week 6 on placebo and to 18.5 (+/-4) on EPA. There were no effects on HAM-D and HAM-A. No clinically relevant side effects were reported. The results of this study suggest that adjunctive EPA is ineffective against OCD.
BeerSheva Mental Health Center, PO Box 4600, Beer-Sheva, Israel.
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Benjamin
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Nemets
D000284:Administration, Oral; D000328:Adult; D018592:Cross-Over Studies; D004334:Drug Administration Schedule; D015118:Eicosapentaenoic Acid / Q000008:administration & dosage / Q000494:pharmacology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009771:Obsessive-Compulsive Disorder / Q000188:drug therapy*; D010919:Placebos; D017367:Selective Serotonin Reuptake Inhibitors / Q000627:therapeutic use; D012720:Severity of Illness Index; D016896:Treatment Outcome
D015118:Eicosapentaenoic Acid; D010919:Placebos; D017367:Selective Serotonin Reuptake Inhibitors