The Efficacy and Safety of Drug Treatments for Chronic Insomnia in Adults: A Meta-analysis of RCTs
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Hypnotics have a role in the management of acute insomnia; however, the efficacy and safety of pharmacological interventions in the management of chronic insomnia is unclear.
The objective of this paper is to conduct a systematic review of the efficacy and safety of drug treatments for chronic insomnia in adults.
Twenty-one electronic databases were searched, up to July 2006.
Randomized double-blind, placebo-controlled trials were eligible. Quality was assessed using the Jadad scale. Data were pooled using the random effects model.
One hundred and five studies were included in the review. Sleep onset latency, as measured by polysomnography, was significantly decreased for benzodiazepines (BDZ), (weighted mean difference: −10.0 minutes; 95% CI: −16.6, −3.4), non-benzodiazepines (non-BDZ) (−12.8 minutes; 95% CI: −16.9, −8.8) and antidepressants (ADP) (−7.0 minutes; 95% CI: −10.7, −3.3). Sleep onset latency assessed by sleep diaries was also improved (BDZ: −19.6 minutes; 95% CI: −23.9, −15.3; non-BDZ: −17.0 minutes; 95% CI: −20.0, −14.0; ADP: −12.2 minutes; 95% CI: −22.3, −2.2). Indirect comparisons between drug categories suggest BDZ and non-BDZ have a similar effect. All drug groups had a statistically significant higher risk of harm compared to placebo (BDZ: risk difference [RD]: 0.15; non-BDZ RD: 0.07; and ADP RD: 0.09), although the most commonly reported adverse events were minor. Indirect comparisons suggest that non-BDZ are safer than BDZ.
Benzodiazepines and non-benzodiazepines are effective treatments in the management of chronic insomnia, although they pose a risk of harm. There is also some evidence that antidepressants are effective and that they pose a risk of harm.
KEY WORDSdrug treatment chronic insomnia
We are grateful to members of the technical expert panel for providing input on the direction of the review.
This study was conducted under contract to the Agency for Healthcare Research and Quality (Contract No.C400_000_021), Rockville, MD., funded by the Office of Medical Applications of Research, National Institutes of Health, Bethesda, MD. The study was presented at the NIH State_of_the_Science Conference on Manifestations and Management of Chronic Insomnia in Adults in June 2005.
The authors of this article are responsible for its contents, including any clinical or treatment recommendations. No statement in this article should be construed as an official position of the Agency for Healthcare Research and Quality, the Office of Medical Applications of Research or the U.S. Department of Health and Human Services.
Conflict of Interest
The corresponding author declares, on behalf of all authors, that there are no conflicts of interest to disclose.None disclosed
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