Various studies have demonstrated the efficacy of selective serotonergic re-uptake inhibitors in the treatment of premenstrual dysphoric disorder (PMDD). But the effectiveness of novel antidepressant, venlafaxine, in PMDD has been reported in only one Western study. The purpose of the present open-label study was to provide preliminary data on the effectiveness of venlafaxine for Asian women with PMDD. Thirty women with PMDD were enrolled and treated with a flexible dosage of venlafaxine for two menstrual cycles. Responses were assessed every 2 weeks. Outcome measures included the scores of the Prospective Record of the Impact and Severity of Menstrual