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Quetiapine is medication used to treat schizophrenia and bipolar disorder. Increasingly, low doses of quetiapine are prescribed "off-label" for insomnia. Quetiapine increases sleep duration with fewer interruptions, and people report feeling more rested. This accounts for why it is popular to prescribe for insomnia. Insomnia and obstructive sleep apnea (OSA) share many symptoms and differential diagnosis can be difficult. While quetiapine may improve sleep and breathing in certain people (i.e in light sleepers) an initial study indicated that quetiapine caused breathing disturbances in healthy individuals. Effects in OSA are unknown. In this placebo-controlled double blind study, participants with mild-moderate OSA will spend 2 nights in the sleep lab, one with quetiapine at a dose commonly prescribed for insomnia and one with placebo. The investigators will assess participants sleep by standard clinical sleep study, and morning alertness using questionnaires, reaction tests, and a driving simulator test.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Quetiapine | Experimental | Quetiapine 50mg in the form of one capsule, taken before bedtime. Dosage is taken on one instance for one night only. |
|
| Placebo | Placebo Comparator | Placebo sugar pill in the form of one capsule, taken before bedtime. Dosage is taken on one instance for one night only. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Quetiapine 50 MG | Drug | A single dose of 50mg of quetiapine taken at bedtime for one night. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Change in OSA severity (Quetiapine night vs. placebo night) | OSA severity as measured by the AHI (apnoea hypopnea index measured as # events/h sleep) during overnight in-laboratory polysomnography. | Two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
| Measure | Description | Time Frame |
|---|---|---|
| Change in nadir overnight hypoxemia (Quetiapine night vs. placebo night) | Nadir overnight oxygen saturation during sleep (%) measured via pulse oximetry during overnight in-laboratory polysomnography. | Two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Danny Eckert, PhD | Flinders University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Adelaide Institute for Sleep Health | Adelaide | South Australia | 5042 | Australia |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 31556541 | Background | Debernard KAB, Frost J, Roland PH. Quetiapine is not a sleeping pill. Tidsskr Nor Laegeforen. 2019 Sep 16;139(13). doi: 10.4045/tidsskr.19.0205. Print 2019 Sep 24. English, Norwegian. | |
| 30359361 | Background | McKean A, Monasterio E, Elliott T. How common is off-label prescription of quetiapine? N Z Med J. 2018 Oct 26;131(1484):77-78. No abstract available. |
| Label | URL |
|---|---|
| Compendium EM. SEROQUEL 25 mg film-coated tablets. 2021 \[cited 2021 22/10/2021\]. | View source |
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Participants will be informed in plain language through the consent form that their deidentified data may be made available to other researchers. Deidentified participant data will only be shared with other researchers upon request to the chief investigator after study publication and subject to ethical approval.
At conclusion of study and related publications.
IPD may be shared for research purposes on application to the chief investigator and subject to applicable ethical review.
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| ID | Term |
|---|---|
| D020181 | Sleep Apnea, Obstructive |
| ID | Term |
|---|---|
| D012891 | Sleep Apnea Syndromes |
| D001049 | Apnea |
| D012120 | Respiration Disorders |
| D012140 | Respiratory Tract Diseases |
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| ID | Term |
|---|---|
| D000069348 | Quetiapine Fumarate |
| D000073893 | Sugars |
| ID | Term |
|---|---|
| D003987 | Dibenzothiazepines |
| D013841 | Thiazepines |
| D013846 | Thiepins |
| D013457 | Sulfur Compounds |
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Double-blind, randomized, placebo-controlled, cross-over study
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| Placebo | Drug | A placebo sugar pill that looks like the quetiapine tablet taken at bedtime for one night. |
|
|
| Change in mean overnight hypoxemia (Quetiapine night vs. placebo night) |
Mean overnight oxygen saturation during sleep (%) measured via pulse oximetry during overnight in-laboratory polysomnography. |
| Two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
| Change in time below 90% blood arterial oxygen saturation (Quetiapine night vs. placebo night) | Percent time asleep spent below an arterial oxygen saturation of 90% measured via pulse oximetry during overnight in-laboratory polysomnography. | Two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
| Change in sleep efficiency (Quetiapine night vs. placebo night) | Percent time spent asleep divided by the recording time from lights out to lights on during overnight in-laboratory polysomnography. | Two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
| Change in arousal index (Quetiapine night vs. placebo night) | Number of cortical arousals per hour of sleep during overnight in-laboratory polysomnography. | Two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
| Change in sleep architecture (Quetiapine night vs. placebo night) | Proportion of sleep stages (% total sleep time) during overnight in-laboratory polysomnography. | Two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
| Change in respiratory control (Quetiapine night vs. placebo night) | Loop gain and the ventilatory response to arousal (% eupnea) during overnight in-laboratory polysomnography. | Two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
| Change in the respiratory arousal threshold (Quetiapine night vs. placebo night) | Threshold to arousal (% eupnea) during overnight in-laboratory polysomnography. | Two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
| Change in airway collapsibility (Quetiapine night vs. placebo night) | Vpassive (% eupnea) during overnight in-laboratory polysomnography. | Two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
| Change in pharyngeal muscle response (Quetiapine night vs. placebo night) | Vcompensation (% eupnea) during overnight in-laboratory polysomnography. | Two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
| Baseline OSA endotypes (outcomes 8-11) and whether they are associated with changes in OSA severity (Quetiapine night vs. placebo night) | Exploratory analysis to determine if baseline OSA endotypes (outcomes 8-11) are associated with changes in OSA severity (Quetiapine night vs. placebo night) | Baseline sleep study |
| Change in perceived sleepiness (Quetiapine night vs. placebo night) | Next day perceived sleepiness assessed via the Karolinska Sleepiness Scale (10 point scale where 1=extremely alert and 10=extremely sleepy) | Next morning following two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
| Change in driving simulator performance (Quetiapine night vs. placebo night) | Next day alertness as measured via the AusEd driving simulator performance task | Next morning following two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
| Change in psycho-motor vigilance (Quetiapine night vs. placebo night) | Next day alertness as measured via the pschomotor vigilance test (PVT) | Next morning following two non-consecutive single night sleep studies (Quetiapine night vs. placebo night) up to one month apart. |
| 25485247 | Background | Pringsheim T, Gardner DM. Dispensed prescriptions for quetiapine and other second-generation antipsychotics in Canada from 2005 to 2012: a descriptive study. CMAJ Open. 2014 Oct 1;2(4):E225-32. doi: 10.9778/cmajo.20140009. eCollection 2014 Oct. |
| 15029469 | Background | Cohrs S, Rodenbeck A, Guan Z, Pohlmann K, Jordan W, Meier A, Ruther E. Sleep-promoting properties of quetiapine in healthy subjects. Psychopharmacology (Berl). 2004 Jul;174(3):421-9. doi: 10.1007/s00213-003-1759-5. Epub 2004 Mar 17. |
| 28093029 | Background | Karsten J, Hagenauw LA, Kamphuis J, Lancel M. Low doses of mirtazapine or quetiapine for transient insomnia: A randomised, double-blind, cross-over, placebo-controlled trial. J Psychopharmacol. 2017 Mar;31(3):327-337. doi: 10.1177/0269881116681399. Epub 2017 Jan 16. |
| 34214960 | Background | Meira E Cruz M, Kryger MH, Morin CM, Palombini L, Salles C, Gozal D. Comorbid Insomnia and Sleep Apnea: mechanisms and implications of an underrecognized and misinterpreted sleep disorder. Sleep Med. 2021 Aug;84:283-288. doi: 10.1016/j.sleep.2021.05.043. Epub 2021 Jun 8. |
| 34229295 | Background | Sweetman A, Lack L, McEvoy RD, Smith S, Eckert DJ, Osman A, Carberry JC, Wallace D, Nguyen PD, Catcheside P. Bi-directional relationships between co-morbid insomnia and sleep apnea (COMISA). Sleep Med Rev. 2021 Dec;60:101519. doi: 10.1016/j.smrv.2021.101519. Epub 2021 Jun 23. |
| 31300334 | Background | Benjafield AV, Ayas NT, Eastwood PR, Heinzer R, Ip MSM, Morrell MJ, Nunez CM, Patel SR, Penzel T, Pepin JL, Peppard PE, Sinha S, Tufik S, Valentine K, Malhotra A. Estimation of the global prevalence and burden of obstructive sleep apnoea: a literature-based analysis. Lancet Respir Med. 2019 Aug;7(8):687-698. doi: 10.1016/S2213-2600(19)30198-5. Epub 2019 Jul 9. |
| 28110857 | Background | Eckert DJ. Phenotypic approaches to obstructive sleep apnoea - New pathways for targeted therapy. Sleep Med Rev. 2018 Feb;37:45-59. doi: 10.1016/j.smrv.2016.12.003. Epub 2016 Dec 18. |
| 23721582 | Background | Eckert DJ, White DP, Jordan AS, Malhotra A, Wellman A. Defining phenotypic causes of obstructive sleep apnea. Identification of novel therapeutic targets. Am J Respir Crit Care Med. 2013 Oct 15;188(8):996-1004. doi: 10.1164/rccm.201303-0448OC. |
| 33965721 | Background | Carter SG, Eckert DJ. Effects of hypnotics on obstructive sleep apnea endotypes and severity: Novel insights into pathophysiology and treatment. Sleep Med Rev. 2021 Aug;58:101492. doi: 10.1016/j.smrv.2021.101492. Epub 2021 Apr 22. |
| 21269278 | Background | Eckert DJ, Owens RL, Kehlmann GB, Wellman A, Rahangdale S, Yim-Yeh S, White DP, Malhotra A. Eszopiclone increases the respiratory arousal threshold and lowers the apnoea/hypopnoea index in obstructive sleep apnoea patients with a low arousal threshold. Clin Sci (Lond). 2011 Jun;120(12):505-14. doi: 10.1042/CS20100588. |
| 28707161 | Background | Khazaie H, Sharafkhaneh A, Khazaie S, Ghadami MR. A weight-independent association between atypical antipsychotic medications and obstructive sleep apnea. Sleep Breath. 2018 Mar;22(1):109-114. doi: 10.1007/s11325-017-1537-y. Epub 2017 Jul 13. |
| 10450601 | Background | Sleep-related breathing disorders in adults: recommendations for syndrome definition and measurement techniques in clinical research. The Report of an American Academy of Sleep Medicine Task Force. Sleep. 1999 Aug 1;22(5):667-89. No abstract available. |
| 41968099 | Derived | Fauska C, Bastiampillai T, Rawson G, Toson B, Vakulin A, Adams R, Wittert G, Loffler KA, Eckert DJ. Quetiapine modestly improves sleep and breathing but impairs next day performance in people with OSA and difficulty maintaining sleep: A randomized controlled trial. Ann Am Thorac Soc. 2026 Apr 10:aaoag092. doi: 10.1093/annalsats/aaoag092. Online ahead of print. |
| AstraZeneca. Australian Product Information Seroquel. 2020. | View source |
| D020919 |
| Sleep Disorders, Intrinsic |
| D020920 | Dyssomnias |
| D012893 | Sleep Wake Disorders |
| D009422 | Nervous System Diseases |
| D009930 |
| Organic Chemicals |
| D006575 | Heterocyclic Compounds, 3-Ring |
| D000072471 | Heterocyclic Compounds, Fused-Ring |
| D006571 | Heterocyclic Compounds |
| D002241 | Carbohydrates |