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The antidepressant efficacy and tolerability of milnacipran, a dual action serotonin-noradrenaline reuptake inhibitor, were compared with those of the selective serotonin reuptake inhibitor, fluvoxamine, in 113 patients with moderate to severe major depression. Treatment with milnacipran, 50 mg b.d. for 6 weeks, produced a significantly greater reduction in Montgomery-Asberg Depression Rating Scale (MADRS) scores than fluvoxamine, 100 mg b.d. (P = 0.007; 65.4% versus 49.9%, respectively); significantly greater decreases were also seen on days 7 (P = 0.04) and 28 (P = 0.03). The response rate (the proportion of patients showing a decrease in MADRS scores of at least 50%) was 78.9% in patients receiving milnacipran, compared with 60.7% in fluvoxamine-treated patients (P = 0.04). Milnacipran also produced greater improvements in 24-item Hamilton Depression Rating Scale scores (P = 0.05). On the Clinical Global Impression Improvement scale, 77.2% of milnacipran-treated patients were rated as considerably or markedly improved, compared with 60.7% of patients receiving fluvoxamine (P = 0.06 chi-squared). Both treatments were well tolerated; the only significant difference between the two groups was a higher incidence of tremor and drowsiness in patients treated with fluvoxamine. It is concluded that milnacipran may offer some advantages over selective serotonin reuptake inhibitors, such as fluvoxamine, in the treatment of moderate to severe major depression.

H. perforatum extract WS 5570 was found to be safe and more effective than placebo for the treatment of mild to moderate depression.