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The article you requested is

Efficacy and Safety of Doxepin 1 mg, 3 mg, and 6 mg in Elderly Patients With Primary Insomnia: A Randomized, Double-Blind, Placebo-Controlled Crossover Study

J Clin Psychiatry 2008;69:1557-1564
Copyright 2008 Physicians Postgraduate Press, Inc.

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Objectives: Evaluate efficacy and safety of the histamine-H1 antagonist doxepin at doses of 1 mg, 3 mg, and 6 mg in elderly adults with primary insomnia.

Design: A randomized, double-blind, placebo-controlled, crossover design was used in this population of elderly adults with primary insomnia (DSM-IV). Each treatment period consisted of 2 polysomnographic (PSG) assessment nights with a 5- or 12-day drug-free interval between periods. The study was conducted from September 2004 to January 2005.

Setting: Sleep laboratories in 11 sleep centers in the United States.

Participants: Elderly adults with primary insomnia.

Intervention: Doxepin 1 mg, 3 mg, and 6 mg.

Measurements: Efficacy was assessed using PSG and patient-reported measures.

Results: Seventy-six patients were randomly assigned. All 3 doxepin doses produced dose-related significant improvements in PSG-determined wake time during sleep (p < .0001), wake time after sleep onset (p < .0001), total sleep time (p < .0001), and overall sleep efficiency (p < .0001) versus placebo. At the 3-mg and 6-mg doses, sleep efficiency was significantly improved during all thirds of the night (p < .05). There was a dose-related decrease in patient-reported sleep latency, with the 6-mg dose achieving statistical significance in latency to sleep onset (p = .0181). The pattern of the remaining subjective efficacy results was consistent with PSG. All 3 doxepin doses had side effect profiles comparable to placebo, with no spontaneously reported anticholinergic effects, no memory impairment, and no significant next-day residual effects.

Conclusions: In this 2-night study of elderly adults with primary insomnia, doxepin doses of 1 mg, 3 mg, and 6 mg were well tolerated and produced significant improvement in objective and subjective sleep maintenance and duration endpoints that persisted into the final hour of the night. Positive effects on patient-reported sleep onset were observed at the highest dose. All 3 doxepin doses had a safety profile comparable to placebo. These data demonstrate that doxepin was efficacious in improving sleep in elderly adults.