Drugs / Lemborexant
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Lemborexant

also known as E2006 · LEM · Dayvigo

Small molecule targets HCRTR1, HCRTR2 via inhibition

Developed for
insomnia · obstructive sleep apnea syndrome · delirium · Alzheimer disease · sleep disorder, initiating and maintaining sleep · circadian rhythm sleep disorder, irregular sleep wake type · circadian rhythm sleep disorder, shift work type · cirrhosis of liver
+7 more · movement disorder · Parkinson disease · sleep disorder · substance-related disorder · alcohol-related disorders · circadian rhythm sleep disorder, delayed sleep phase type · epilepsy
Investigated by
Eisai Inc. · Purdue Pharma LP · Chulalongkorn University · Toronto Metropolitan University · Beijing Tiantan Hospital · Brendan Lucey
+26 more · Centre for Addiction and Mental Health · Eisai Inc. · Flinders University · Indonesia University · Kurume University · Laval University · Mahidol University · Mebix Inc · Nanjing University · National Institute on Aging (NIA) · National Institute on Drug Abuse (NIDA) · National Institutes of Health (NIH) · Nova Scotia Health Authority · Phramongkutklao College of Medicine and Hospital · Providence Health Care, British Columbia · Silpakorn University · St. Paul's Hospital, Vancouver (Providence Health Care) · The Royal Ottawa Mental Health Centre · Unity Health Toronto · University of British Columbia · University of California, San Francisco · University of Minnesota · University of Toronto · Virginia Commonwealth University · Woolcock Institute of Medical Research · YangPan

Regulatory milestones approvals, filings & regulatory actions · 2 recorded

MilestoneJurisdictionBrandIndicationDateSentence it was read from
Label expansion US (FDA) DAYVIGO 2023-04-20 fda.gov
Approved US (FDA) DAYVIGO 2019-12-20 fda.gov

Trials 43 · a red edge is where a trial was stopped

PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 119 trials
Phase 1 NCT04890561 May → Aug 2021 Eisai Inc. Completed No outcome recorded
Phase 1 NCT04647383 Jan 2021 → Feb 2022 chronic obstructive pulmonary disease, obstructive sleep apnea syndrome Eisai Inc. Completed No outcome recorded
Phase 1 NCT04555733 Oct 2020 → Jan 2021 Eisai Inc. Completed No outcome recorded
Phase 1 NCT03483636 Mar → Sep 2018 Eisai Inc. Completed No outcome recorded
Phase 1 NCT03471871 Feb → Aug 2018 obstructive sleep apnea syndrome Eisai Inc. Completed No outcome recorded
Phase 1 NCT03443063 Feb → Aug 2018 impaired renal function disease Eisai Inc. Completed No outcome recorded
Phase 1 NCT03451110 Feb → Mar 2018 Eisai Inc. Completed No outcome recorded
Phase 1 NCT03440424 Jan → Apr 2018 Eisai Inc. Completed No outcome recorded
Phase 1 NCT03158025 Apr 2017 → Jul 2018 insomnia Eisai Inc. Completed No outcome recorded
Phase 1 NCT03008447 Nov 2016 → Jan 2018 Eisai Inc. Completed No outcome recorded
Phase 1/22 trials
Phase 1/2 NCT07683442 Sep 2026 → Jun 2028 expected obstructive sleep apnea syndrome Chulalongkorn University Not yet recruiting No outcome recorded
Phase 1/2 NCT05763329 Feb 2023 → Feb 2025 obstructive sleep apnea syndrome Chulalongkorn University Completed No outcome recorded
Phase 212 trials
Phase 2 NCT07695285 Sep 2026 → Sep 2029 expected delirium Beijing Tiantan Hospital Not yet recruiting No outcome recorded
Phase 2 NCT06981195 May 2025 → Jul 2029 expected insomnia, substance-related disorder Virginia Commonwealth University Recruiting No outcome recorded
Phase 2 NCT06823752 May 2025 → Apr 2026 overdue insomnia Woolcock Institute of Medical Research Recruiting No outcome recorded
Phase 2 NCT06648681 May 2025 → Apr 2027 expected delirium University of British Columbia Not yet recruiting No outcome recorded
Phase 2 NCT06928766 May 2025 → May 2027 expected obstructive sleep apnea syndrome Flinders University Not yet recruiting No outcome recorded
Phase 2 NCT07480096 Oct 2024 → Oct 2025 cirrhosis of liver, hepatic encephalopathy, insomnia Indonesia University Completed No outcome recorded
Phase 2 NCT06843187 Sep 2024 → Dec 2027 expected insomnia, major depressive disorder Unity Health Toronto Recruiting No outcome recorded
Phase 2 NCT06274528 Mar 2024 → Mar 2030 expected Alzheimer disease University of Minnesota Recruiting No outcome recorded
Phase 2 NCT05728736 Mar → Sep 2023 Alzheimer disease Brendan Lucey Withdrawn No outcome recorded
Phase 2 NCT05594589 Nov 2022 → Apr 2024 sleep disorder, initiating and maintaining sleep Eisai Inc. Completed No outcome recorded
Phase 34 trials
Phase 3 NCT06496282 Aug 2024 → May 2026 overdue Phramongkutklao College of Medicine and Hospital Recruiting No outcome recorded
Phase 3 NCT04549168 Nov 2020 → Mar 2023 sleep disorder, initiating and maintaining sleep Eisai Inc. Completed No outcome recorded
Phase 3 NCT02952820 Nov 2016 → Jan 2019 insomnia Eisai Inc. Completed No outcome recorded
Phase 3 NCT02783729 May 2016 → Jan 2018 insomnia Eisai Inc. Completed No outcome recorded
Phase 45 trials
Phase 4 NCT07384429 Aug → Dec 2026 expected Parkinson disease, insomnia, movement disorder YangPan Not yet recruiting No outcome recorded
Phase 4 NCT07407400 Apr 2026 → Jul 2027 expected delirium, sleep disorder Mahidol University Not yet recruiting No outcome recorded
Phase 4 NCT06093126 Dec 2023 → Dec 2028 expected frontotemporal dementia, insomnia Nova Scotia Health Authority Recruiting No outcome recorded
Phase 4 NCT05344443 Mar 2022 → Nov 2024 circadian rhythm sleep disorder, shift work type University of California, San Francisco Completed No outcome recorded
Phase 4 NCT04742699 Mar 2021 → Jun 2022 insomnia Kurume University Completed No outcome recorded
Phase not applicable1 trial
NCT06779149 Apr 2025 → Feb 2027 expected insomnia Laval University Recruiting No outcome recorded
Also used as a comparator or background therapy in 6 trials
PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 1/21 trial
Phase 1/2 NCT04818086 Comparator May 2021 → Apr 2023 substance-related disorder Virginia Commonwealth University Completed No outcome recorded
Phase 21 trial
Phase 2 NCT06231641 Comparator Jan 2024 → Mar 2026 circadian rhythm sleep disorder, shift work type Centre Integre Universitaire de Sante et Services Sociaux du Nord de l'ile de Montreal Terminated No outcome recorded
Phase 32 trials
Phase 3 NCT06262594 Comparator Oct 2024 → Apr 2026 overdue epilepsy University of Manitoba Recruiting No outcome recorded
Phase 3 NCT05458609 Comparator Feb 2023 → Jan 2024 alcohol-related disorders Baylor College of Medicine Completed No outcome recorded
Phase 42 trials
Phase 4 NCT06874855 Comparator Mar 2023 → May 2027 expected circadian rhythm sleep disorder, delayed sleep phase type University of California, San Francisco Recruiting No outcome recorded
Phase 4 NCT05463861 Comparator Feb 2022 → Jan 2026 circadian rhythm sleep disorder, delayed sleep phase type Stanford University Completed No outcome recorded

Evidence & citations 9 cited values

Every value below carries the sentence it was read from. 55 sources stand behind the page.

FieldValueCited text
Known as Lemborexant “the dual orexin-receptor antagonist lemborexant (LEM) in older adults” PMID 39120786 Aug 2024
40

NCT05458609

NCT06648681

NCT06496282

NCT06981195

NCT07683442

NCT03001557

NCT04555733

NCT06928766

NCT02952820

NCT04647383

NCT04549168

NCT07480096

NCT02583451

NCT06262594

NCT07384429

NCT06231641

NCT05463861

NCT07695285

NCT02783729

NCT03451110

NCT07407400

NCT05344443

NCT04890561

NCT03483636

NCT04818086

NCT03443063

NCT05594589

NCT06093126

NCT05763329

NCT06874855

NCT03471871

NCT06843187

NCT05728736

NCT02350309

NCT06823752

NCT03158025

NCT04742699

NCT06779149

NCT03440424

NCT06274528

Known as Dayvigo “Lemborexant (Dayvigo) is a Dual Orexin Receptor Antagonist approved by Health Canada for the treatment of adult with insomnia, characterized by difficulties with sleep onset...” NCT06779149
4

“Lemborexant (trade name Dayvigo), 10mg capsules, administered orally” NCT06981195

“Lemborexant 5 MG Oral Tablet [Dayvigo] Day 1” NCT05763329

“Lemborexant 5 MG [Dayvigo] Period 1” NCT07683442

“Lemborexant 5 MG [Dayvigo]” NCT06231641

Known as E2006 “Lemborexant (E2006)” NCT03440424
8

NCT02046213

NCT01995838

NCT01673451

NCT01673880

NCT02089412

NCT01463098

NCT02039089

NCT02085967

Known as LEM “As part of a human abuse potential (HAP) study of lemborexant (LEM), the effects of therapeutic (LEM 10 mg), and supratherapeutic doses of LEM 20 mg and LEM 30 mg on cognition...” PMID 35748777 Jun 2022
6

“OBJECTIVE: To evaluate effects of lemborexant (LEM), a dual orexin receptor antagonist, on next-morning sleep propensity assessed by a modified Multiple Sleep Latency Test...” PMID 37193566 Jul 2021

“This study evaluated the efficacy and safety of lemborexant (LEM), a dual orexin-receptor antagonist, in participants with insomnia disorder in China.” PMID 41442783 Dec 2025

lemborexant (LEM) 10 mg (LEM10), a competitive dual orexin-receptor antagonist” PMID 40848323 Aug 2025

“the dual orexin-receptor antagonist lemborexant (LEM) in older adults.” PMID 39120786 Aug 2024

lemborexant (LEM), a dual orexin receptor antagonist” PMID 39823487 Jan 2025

Lemborexant (LEM) 5 mg (Z-Drug-mono cohort)” NCT04742699

Action Inhibit “a dual orexin receptor antagonist” PMID 37193566 Jul 2021
2

“Orexin receptor 1 antagonist” CHEMBL3545367

“Orexin receptor 2 antagonist” CHEMBL3545367

Modality Small molecule CHEMBL3545367
Route Oral “single oral doses of E2006” NCT01463098
Target HCRTR1 “Orexin receptor 1 antagonist” CHEMBL3545367
Target HCRTR2 “Orexin receptor 2 antagonist” CHEMBL3545367