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  • Title: Estazolam treatment of insomnia in generalized anxiety disorder: a placebo-controlled study.
    Author: Post GL, Patrick RO, Crowder JE, Houston J, Ferguson JM, Bielski RJ, Bailey L, Pearlman HG, Shu VS, Pierce MW.
    Journal: J Clin Psychopharmacol; 1991 Aug; 11(4):249-53. PubMed ID: 1918423.
    Abstract:
    Estazolam, a triazolobenzodiazepine with an intermediate elimination half-life, has been shown previously to be an effective and safe hypnotic in insomniacs without concomitant psychiatric illness. Our study of the efficacy of estazolam in patients with insomnia associated with generalized anxiety disorder began when 108 patients meeting criteria for generalized anxiety disorder (mean total score of Hamilton Rating Scale for Anxiety [HAM-A] = 22.0 +/- 3.1 [SD]) and insomnia were given single-blind placebo for 7 nights. Nine patients whose anxiety and/or insomnia improved were dropped as placebo responders. The remaining 99 patients were randomly allocated (1:1) to double-blind treatment with either estazolam 2.0 mg or matching placebo for 7 nights. Hypnotic efficacy, as determined by patient-completed sleep questionnaires, was statistically significant for estazolam 2.0 mg versus placebo for all sleep indices (p less than 0.01). Patients treated with estazolam 2.0 mg showed significantly greater improvement in anxiety than those receiving placebo on the mean total score of HAM-A ([placebo, -3.4; estazolam, -7.1; p less than 0.001] and without the insomnia item [placebo, -2.7; estazolam, -5.5; p less than 0.001]). Anxiety scores on the State-Trait Anxiety Inventory showed greater improvement in the estazolam group, but without statistical significance (p = 0.237). Estazolam 2.0 mg is an effective hypnotic in patients with generalized anxiety disorder and appears to have a favorable anxiolytic action.
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