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  • Title: Esmirtazapine in non-elderly adult patients with primary insomnia: efficacy and safety from a randomized, 6-week sleep laboratory trial.
    Author: Ivgy-May N, Ruwe F, Krystal A, Roth T.
    Journal: Sleep Med; 2015 Jul; 16(7):838-44. PubMed ID: 26047892.
    Abstract:
    OBJECTIVE: Esmirtazapine (Org 50081), a medication that binds with high affinity to serotonin 5-HT2A and histamine-1 receptors, was evaluated as a potential treatment for insomnia. METHODS: Adults with primary insomnia were treated with esmirtazapine (3.0 or 4.5 mg) or placebo in this 6-week, double-blind, randomized, polysomnography (PSG) study. The end points included wake time after sleep onset (WASO) (primary), latency to persistent sleep, and total sleep time. Patient-reported parameters were also evaluated, including sleep quality and satisfaction with sleep duration. Residual daytime effects and rebound insomnia (sleep parameters during the single-blind placebo run-out week after treatment ended) were also assessed. RESULTS: Overall, 419 patients were randomized and 366 (87%) completed treatment. The median decrease in PSG WASO (double-blind average) was 20.5 min for placebo, and 52.0 min and 53.6 min for the 3.0- and 4.5-mg esmirtazapine groups, respectively (P < 0.0001 vs. placebo for both doses). Changes in the other PSG parameters and in all patient-reported parameters were also statistically significant with both doses versus placebo. Overall, 35-42% of esmirtazapine-treated patients had adverse events (AEs) versus 29% in the placebo group. AEs were mild or moderate in most esmirtazapine-treated patients. Furthermore, the incidence of AEs leading to discontinuation was low (<8%). CONCLUSIONS: Six weeks of treatment with esmirtazapine was associated with consistent improvements in objective and patient-reported parameters of sleep onset, maintenance, and duration. It was generally well tolerated, and residual daytime effects were minimal and no rebound insomnia was observed.
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