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Abstract
Ramelteon is a selective MT1/MT2-receptor agonist indicated for insomnia treatment. Because it has no depressant effects on the nervous system, it is not expected to affect the control of breathing. The potential effects of ramelteon on apneic and hypopneic events and arterial oxygen saturation (SaO2) in individuals with obstructive sleep apnea were assessed. In this double-blind, randomized, crossover study, 26 adults with mild to moderate obstructive sleep apnea received ramelteon 16 mg and placebo for one night each, with a 5- to 12-day washout period between treatments. Treatments were administered 30 min before habitual bedtime. Respiratory effort was monitored using respiratory inductance plethysmography, SaO2 was measured by pulse oximetry, and sleep onset and duration were measured by polysomnography and post-sleep questionnaire. Post-sleep questionnaire also measured next-day residual effects. The primary measure was apnea–hypopnea index. Apnea–hypopnea index was similar in ramelteon and placebo groups (11.4 vs 11.1, respectively; CI = −2.1, 2.6,P = 0.812). Ramelteon had no effect on the number of central, obstructive, or mixed apnea episodes. No significant differences were observed in SaO2 for the entire night between ramelteon and placebo (95.1 vs 94.7%;P = 0.070). Ramelteon did not meaningfully affect sleep when evaluated by polysomnography and post-sleep questionnaire. Compared with placebo, ramelteon had no significant effect on next-day residual effects. Adverse events were reported by three subjects in the ramelteon group: headache (n = 2) and urinary tract infection (n = 1). No adverse events were reported with placebo. Ramelteon was well-tolerated and, as expected, did not worsen sleep apnea when administered to subjects with mild to moderate obstructive sleep apnea.
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Acknowledgements
This study was funded by Takeda Pharmaceutical Company Limited.
Author Financial Disclosure
Meir Kryger, MD: Consultant, Takeda Pharmaceuticals North America, Inc.
Thomas Roth, PhD: Grants and Consultant, Takeda Pharmaceuticals North America, Inc.
Sherry Wang-Weigand, MD, PhD: Employee, Takeda Global Research & Development Center.
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Gaylord Hospital, Sleep Research and Education, 400 Gaylord Farm Road, Wallingford, CT, 06492, USA
Meir Kryger
Takeda Global Research and Development Center, Inc., Deerfield, IL, USA
Sherry Wang-Weigand
Sleep Disorders and Research Center, Henry Ford Hospital, Detroit, MI, USA
Thomas Roth
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Correspondence toMeir Kryger.
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Kryger, M., Wang-Weigand, S. & Roth, T. Safety of ramelteon in individuals with mild to moderate obstructive sleep apnea.Sleep Breath11, 159–164 (2007). https://doi.org/10.1007/s11325-006-0096-4
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