All patients with chronic insomnia should receive cognitive behavioral therapy as a primary intervention, and clinicians should use a shared decision-making approach when determining whether patients should start pharmacotherapy, according to a new guideline developed by the American Academy of Sleep Medicine (AASM). The guideline, which includes 14 recommendations, was published in the February 15 issue of the Journal of Clinical Sleep Medicine. It is the first guideline from the AASM to provide comprehensive evidence-based analyses of individual drugs commonly used to treat chronic insomnia disorder.
Ronald D. Chervin, MD
Chronic insomnia is associated with increased work absenteeism and impairment in functional status. Studies have also identified persistent insomnia as a significant risk factor for the development of psychiatric disorders, especially mood disorder. Pharmacologic treatment of insomnia is the most widely used approach to therapy, after treatment of comorbidities. No evidence-based clinical guideline had been published previously, however. The AASM commissioned a task force of four sleep medicine experts to develop the clinical guideline for treatment of chronic insomnia in adults.
The task force conducted a systematic review to identify randomized controlled trials. In addition, the group used the Grading of Recommendations Assessment, Development, and Evaluation process to assess the evidence. Recommendations were then made based on the quality of evidence, the balance of benefits and harms, and patient values and preferences.
Sleep Onset Insomnia Treatment Recommendations
The guideline recommends eszopiclone for the treatment of sleep onset insomnia, based on trials of 2-mg and 3-mg doses of the drug. Mean reduction of sleep latency was 14 minutes greater with eszopiclone than with placebo. Researchers also observed a moderate-to-large improvement in quality of sleep when they compared eszopiclone with placebo.
The experts also recommend ramelteon, based on trials of 8-mg doses of the drug. Mean reduction of sleep latency was nine minutes greater with ramelteon than with placebo. Ramelteon may not improve quality of sleep, however. Clinicians also are advised to use temazepam, based on trials of 15-mg doses. Temazepam reduced sleep latency by 37 minutes, compared with placebo, and provided a small improvement in quality of sleep.
The quality of evidence for the use of triazolam was high, and the drug reduced sleep latency by nine minutes, compared with placebo. The task force determined that the majority of patients would be more likely to use triazolam, compared with no treatment, but many would not use it. Zaleplon was recommended based on trials of 5-mg and 10-mg doses. It reduced sleep latency by 10 minutes, compared with placebo. Finally, zolpidem reduced sleep latency by five to 12 minutes, compared with placebo, and was associated with a moderate improvement in quality of sleep. The quality of evidence was very low, however.
Sleep Maintenance Insomnia Recommendations
The task force found four studies evaluating a 3-mg dose of doxepin and four studies investigating a 6-mg dose in sleep maintenance insomnia. Mean improvement in total sleep time with the drug was 26–32 min longer, compared with placebo. The mean reduction in wake after sleep onset (WASO) associated with doxepin was 22–23 min greater, compared with placebo.
The recommendation for the use of eszopiclone was based on trials of 2-mg and 3-mg doses of the drug. Mean improvement in total sleep time was 28–57 min longer with eszopiclone, compared with placebo. Mean reduction in WASO was 10–14 min greater with eszopiclone, compared with placebo.
Trials of 15-mg doses of temazepam were the basis for the task force’s recommendation of the drug. Mean improvement in total sleep time with temazepam was 99 min longer, compared with placebo. The drug’s effect on WASO was not reported. Compared with placebo, temazepam may provide a small improvement in quality of sleep.
Suvorexant was evaluated in trials of 10-mg, 15–20-mg, and 20-mg doses. Mean improvement in total sleep time was 10 min longer with suvorexant, compared with placebo. Mean reduction in WASO was 16–28 min greater with suvorexant, compared to placebo.
The guideline also recommends zolpidem, based on trials of 10-mg doses. Zolpidem provided a mean improvement in total sleep time that was 29 min longer, compared with placebo. The mean reduction in WASO was 25 min greater with zolpidem, compared with placebo.
Certain Drugs Are Not Recommended
Several drugs were not recommended for treating sleep onset or sleep maintenance insomnia. The task force suggests that clinicians not use diphenhydramine, because the evidence suggests that it is not effective for improving sleep onset or total sleep time. Similarly, evidence suggests that the effects of tiagabine on objective and subjective measures of sleep latency are clinically insignificant, and the drug’s harms may outweigh its benefits. Sleep outcome variables also did not improve with trazodone to a clinically significant degree. The task force also suggested that clinicians not use melatonin, valerian, or L-tryptophan because of the treatments’ lack of clinically significant effects.
All recommendations were classified as weak, due to the task force’s low degree of certainty in the appropriateness of the patient-care strategy. Further study is required to determine the drugs’ efficacy or lack thereof, said the task force. “Clinicians must continue to exercise sound clinical judgment based not only on these recommendations, but also on clinical experience, prior patient response, patient preferences, and potential adverse effects,” the authors concluded.
—Erica Tricarico
Suggested Reading
Sateia MJ, Buysse DJ, Krystal AD, et al. Clinical practice guideline for the pharmacologic treatment of chronic insomnia in adults: An American Academy of Sleep Medicine clinical practice guideline. J Clin Sleep Med. 2017;13(2):307-349.