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Showing 1–24 of 27 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Suvorexant 20 mg Clear all
Completed Phase 2 Interventional Accepts healthy volunteers Results available

REPOSE Study: Reducing Delirium by Enhancing Postoperative Sleep With Suvorexant

NCT05733286
View directory record Official record
Conditions
Delirium in Old Age
Interventions
Suvorexant 20 mg, Placebo
Drug
Lead sponsor
Duke University
Other
Eligibility
65 Years and older
Enrollment
142 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 14, 2026 · Synced Sep 25, 2026, 1:52 AM EDT
Recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

Suvorexant for Alcohol Use Disorder (AUD): Neural Mechanisms

NCT06484075
View directory record Official record
Conditions
Healthy Volunteers, Alcohol Use Disorder (AUD)
Interventions
Placebo, Suvorexant
Drug
Lead sponsor
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
NIH
Eligibility
18 Years to 75 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2029
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 17, 2026 · Synced Sep 25, 2026, 1:52 AM EDT
Completed Phase 4 Interventional Results available

Suvorexant and Trauma Related Insomnia

NCT02704754
View directory record Official record
Conditions
Insomnia, Posttraumatic Stress Disorder
Interventions
suvorexant, placebo
Drug · Other
Lead sponsor
Howard University
Other
Eligibility
18 Years to 55 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Feb 14, 2023 · Synced Sep 25, 2026, 1:52 AM EDT
Completed Phase 2 Interventional Results available

Medication Development in Alcoholism: Suvorexant Versus Placebo

NCT04229095
View directory record Official record
Conditions
Alcohol Use Disorder (AUD)
Interventions
Suvorexant 20 mg, Placebo oral tablet
Drug
Lead sponsor
The Scripps Research Institute
Other
Eligibility
18 Years to 65 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Apr 25, 2023 · Synced Sep 25, 2026, 1:52 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Sleep Trial to Prevent Alzheimer's Disease

NCT04629547
View directory record Official record
Conditions
Sleep, Alzheimer Disease
Interventions
Suvorexant 20 mg, Placebo
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
65 Years and older
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2028
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Sep 25, 2026, 1:52 AM EDT
Not yet recruiting Phase 4 Interventional

The Effects of Orexin Antagonism on Fear Extinction in PTSD

NCT06788522
View directory record Official record
Conditions
Insomnia, PTSD
Interventions
Suvorexant, Placebo
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 75 Years
Enrollment
40,120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2032
U.S. locations
2
States / cities
San Francisco, California • Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Sep 25, 2026, 1:52 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Trial of Suvorexant for Sleep in Children With Autism

NCT05546554
View directory record Official record
Conditions
Autism, Autism Spectrum Disorder
Interventions
Suvorexant, Placebo
Drug
Lead sponsor
Stanford University
Other
Eligibility
13 Years to 17 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Sep 25, 2026, 1:52 AM EDT
Recruiting Phase 3 Interventional

A Study of Suvorexant (MK-4305) for the Treatment of Insomnia Disorder in Participants With Opioid Use Disorder (MK-4305-098)

NCT06655883
View directory record Official record
Conditions
Insomnia
Interventions
Suvorexant, Placebo
Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years to 70 Years
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
13
States / cities
Garden Grove, California • New Haven, Connecticut • Bradenton, Florida + 10 more
Source: ClinicalTrials.gov public record
Updated Sep 20, 2026 · Synced Sep 25, 2026, 1:52 AM EDT
Completed Phase 4 Interventional Results available

Suvorexant on Sleep Disturbance in Patients With Chronic Insomnia and Suboptimally Controlled Type 2 Diabetes

NCT03818581
View directory record Official record
Conditions
Type 2 Diabetes Mellitus, Insomnia, Sleep Disorder, Inflammation
Interventions
Suvorexant, Placebo
Drug · Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
25 Years to 75 Years
Enrollment
108 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 19, 2024 · Synced Sep 25, 2026, 1:52 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Orexin s Role in the Neurobiology of Substance Use Disorder

NCT05630781
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Belsomra, Placebo, Methylphenidate
Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 60 Years
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 10, 2026 · Synced Sep 25, 2026, 1:52 AM EDT
Completed Phase 4 Interventional Results available

Efficacy of Suvorexant on Post-operative Sleep Disturbance

NCT05823844
View directory record Official record
Conditions
Postoperative Insomnia, Postoperative Delirium
Interventions
Suvorexant, Placebo
Drug
Lead sponsor
Columbia University
Other
Eligibility
50 Years to 90 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Sep 25, 2026, 1:52 AM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Suvorexant and Alcohol

NCT06326684
View directory record Official record
Conditions
Alcohol Use Disorder
Interventions
Alcohol, Placebo, Suvorexant
Drug
Lead sponsor
William Stoops
Other
Eligibility
21 Years to 55 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Jun 7, 2026 · Synced Sep 25, 2026, 1:52 AM EDT
Completed Phase 4 Interventional Results available

Efficacy of Suvorexant in the Treatment of Hot Flash-associated Insomnia

NCT03034018
View directory record Official record
Conditions
Insomnia
Interventions
suvorexant, placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
40 Years to 65 Years · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 13, 2022 · Synced Sep 25, 2026, 1:52 AM EDT
Completed Phase 4 Interventional Results available

Study to Compare the Awakening Threshold Effects of Belsomra 10 mg and 20 mg to Placebo in Non-elderly Insomniacs

NCT03312517
View directory record Official record
Conditions
Insomnia
Interventions
Suvorexant 10 mg, Suvorexant 20 mg, Placebo oral capsule
Drug
Lead sponsor
Henry Ford Health System
Other
Eligibility
18 Years to 64 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Novi, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 31, 2019 · Synced Sep 25, 2026, 1:52 AM EDT
Completed Phase 2 Interventional Results available

Role of the Orexin Receptor System in Stress, Sleep and Cocaine Use

NCT02785406
View directory record Official record
Conditions
Cocaine Use Disorder, Anxiety
Interventions
suvorexant, Placebo (for suvorexant)
Drug
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
19 Years to 55 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 10, 2019 · Synced Sep 25, 2026, 1:52 AM EDT
Completed Phase 2Phase 3 Interventional Results available

The Efficacy of Suvorexant in Treatment of Patients With Substance Use Disorder and Insomnia: A Pilot Open Trial

NCT03412591
View directory record Official record
Conditions
Sleep Disturbance, Craving, Cortisol; Hypersecretion
Interventions
Suvorexant 20 mg
Drug
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
21 Years to 64 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Wernersville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 12, 2024 · Synced Sep 25, 2026, 1:52 AM EDT
Completed Phase 4 Interventional Results available

A Study of Suvorexant in Patients With Multiple Sclerosis Fatigue and Insomnia

NCT03110315
View directory record Official record
Conditions
Multiple Sclerosis, Fatigue, Insomnia
Interventions
Suvorexant, Placebo
Drug
Lead sponsor
Theodore R. Brown, MD MPH
Other
Eligibility
18 Years to 75 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Kirkland, Washington
Source: ClinicalTrials.gov public record
Updated Feb 2, 2025 · Synced Sep 25, 2026, 1:52 AM EDT
Completed Phase 2 Interventional Results available

Suvorexant to Reduce Symptoms of Nicotine Use

NCT04234997
View directory record Official record
Conditions
Smoking Cessation
Interventions
Suvorexant 20 mg, Suvorexant 0mg
Drug
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 65 Years
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 30, 2025 · Synced Sep 25, 2026, 1:52 AM EDT
Completed Phase 1 Interventional

Targeting Orexin to Treat Nicotine Dependence

NCT03999099
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Suvorexant 20 mg, Suvorexant 10 mg, Placebo oral tablet
Drug
Lead sponsor
Mclean Hospital
Other
Eligibility
18 Years to 50 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 20, 2026 · Synced Sep 25, 2026, 1:52 AM EDT
Completed Phase 4 Interventional Results available

Efficacy of Suvorexant in Patients With Effectively Treated Restless Legs Syndrome and Persistent Chronic Insomnia

NCT04706091
View directory record Official record
Conditions
Restless Legs Syndrome, Insomnia, Sleep Disorder
Interventions
Suvorexant, Placebo
Drug · Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
25 Years to 85 Years
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 15, 2024 · Synced Sep 25, 2026, 1:52 AM EDT
Not yet recruiting Phase 4 Interventional

Suvorexant 3 - PE-PC

NCT07686731
View directory record Official record
Conditions
PTSD - Post Traumatic Stress Disorder, Insomnia, TBI (Traumatic Brain Injury)
Interventions
Suvorexant, Placebo, Prolonged Exposure Therapy for Primary Care (PE-PC)
Drug · Behavioral
Lead sponsor
Northern California Institute of Research and Education
Other
Eligibility
18 Years to 75 Years
Enrollment
142 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Sep 25, 2026, 1:52 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Suvorexant and Sleep's Benefits to Therapeutic Exposure for Posttraumatic Stress Disorder

NCT02849548
View directory record Official record
Conditions
Posttraumatic Stress Disorder
Interventions
suvorexant, placebo
Drug · Other
Lead sponsor
Howard University
Other
Eligibility
18 Years and older
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jun 1, 2023 · Synced Sep 25, 2026, 1:52 AM EDT
Terminated Phase 4 Interventional Results available

Suvorexant in Insomnia Co-morbid With Fibromyalgia

NCT02684136
View directory record Official record
Conditions
Insomnia, Fibromyalgia
Interventions
suvorexant, placebo
Drug
Lead sponsor
Henry Ford Health System
Other
Eligibility
21 Years to 65 Years · Female only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 15, 2021 · Synced Sep 25, 2026, 1:52 AM EDT
Terminated Phase 4 Interventional Results available

Double-blind Randomized Controlled Trial Comparing Suvorexant 20 mg to Placebo for Treatment of Insomnia in Cancer Survivors

NCT06162663
View directory record Official record
Conditions
Breast Cancer, Insomnia
Interventions
Suvorexant Tablets, Placebo Control
Drug · Other
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years and older · Female only
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 25, 2026, 1:52 AM EDT