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  • Title: Hypnotic efficacy of estazolam compared with flurazepam in outpatients with insomnia.
    Author: Cohn JB, Wilcox CS, Bremner J, Ettinger M.
    Journal: J Clin Pharmacol; 1991 Aug; 31(8):747-50. PubMed ID: 1880233.
    Abstract:
    Estazolam is a new benzodiazepine hypnotic agent with an intermediate half-life of 12 to 15 hours. The authors designed an investigation to compare its hypnotic efficacy to that of flurazepam, generally considered the reference standard. The hypnotic efficacy of estazolam at two doses (1 mg and 2 mg) was compared with that of flurazepam (30 mg) in a double-blind, placebo-controlled, multicenter, 7-night study that involved 223 outpatients with insomnia. On subjective assessments of the patients, no differences were noted between estazolam 2 mg and flurazepam 30 mg on any of six sleep parameters. Patients who were receiving estazolam 1 mg rated their sleep significantly better than did patients who were receiving placebo on all parameters except sleep latency. Global evaluation of the physicians indicated significant improvement in quality of sleep, sleep depth, sleep duration, and nocturnal awakenings in all three active treatment groups; estazolam 2 mg and flurazepam also decreased sleep latency significantly. The percentage of patients who reported any adverse experience was 68% for flurazepam, 58% for estazolam 2 mg, and 54% for estazolam 1 mg; the incidence of adverse events in the placebo group was 43%. In conclusion, estazolam 2 mg was found to be as effective a hypnotic as flurazepam 30 mg. Estazolam 1 mg is also effective in the treatment of outpatients with insomnia, but to a lesser degree.
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