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ClinicalTrials.gov public records Last synced Oct 11, 2026, 8:53 PM EDT

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Showing 121–144 of 154 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Sleep Disorders, Circadian Rhythm Clear all
Recruiting Not applicable Interventional

Shift Worker Intervention for Sleep Health

NCT06384742
View directory record Official record
Conditions
Shift Work Type Circadian Rhythm Sleep Disorder, Insomnia, Psychophysiological
Interventions
Shift Worker Intervention for Sleep Health
Behavioral
Lead sponsor
Oregon State University
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Corvallis, Oregon
Source: ClinicalTrials.gov public record
Updated May 2, 2025 · Synced Oct 11, 2026, 8:53 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

NIMH Rhythms and Blues Study: A Prospective Natural History Study of Motor Activity, Mood States, and Bipolar Disorder

NCT05669703
View directory record Official record
Conditions
Bipolar Disorder, Major Depression, Migraine
Interventions
Not listed
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
8 Years to 70 Years
Enrollment
1,260 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 7, 2026 · Synced Oct 11, 2026, 8:53 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Circulating and Tissue-specific Lipids on Vascular Function and Insulin Sensitivity in Chronic Night Shift Workers

NCT06550115
View directory record Official record
Conditions
Circadian Rhythm Sleep Disorder of Shift Work Type, Metabolic Disease, Insulin Sensitivity, Blood Pressure
Interventions
Time-restricted eating, Control eating
Behavioral
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2029
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Oct 11, 2026, 8:53 PM EDT
Completed Not applicable Interventional

Investigating Circadian Rhythms in Youth With Persistent Tic Disorders

NCT03508245
View directory record Official record
Conditions
Tourette's Disorder
Interventions
Wearable short wavelength light therapy
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
13 Years to 17 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Dec 12, 2023 · Synced Oct 11, 2026, 8:53 PM EDT
Active, not recruiting Not applicable Interventional

Bright Light Therapy for Non-motor Symptoms in Parkinson's Disease

NCT02909192
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Light Therapy Device
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
40 Years and older
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 5, 2025 · Synced Oct 11, 2026, 8:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Sleep Timing, Eating and Activity Measurement Study

NCT04992611
View directory record Official record
Conditions
Sleep, Circadian Rhythm Disorders, Dietary Habits
Interventions
Sleep Extension (Early), Sleep Extension (Late)
Behavioral
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
14 Years to 18 Years
Enrollment
190 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 22, 2026 · Synced Oct 11, 2026, 8:53 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Breath Biomarkers for Sleep Loss and Circadian Timing

NCT03980340
View directory record Official record
Conditions
Shift-Work Sleep Disorder, Shift Work Type Circadian Rhythm Sleep Disorder, Sleep Disorders, Circadian Rhythm, Sleep Disorders, Intrinsic, Advanced Sleep Phase Syndrome (ASPS), Advanced Sleep Phase Syndrome, Advanced Sleep Phase, Delayed Sleep Phase, Delayed Sleep Phase Syndrome, Non-24 Hour Sleep-Wake Disorder, Irregular Sleep-Wake Syndrome
Interventions
Short Nap Intervention, No Nap Intervention
Behavioral
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 50 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 3, 2025 · Synced Oct 11, 2026, 8:53 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Sleep, Circadian Rhythm & Skin Health

NCT02457000
View directory record Official record
Conditions
Healthy, Psoriasis, Eczema, Acne
Interventions
Not listed
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
18 Years and older
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 15, 2021 · Synced Oct 11, 2026, 8:53 PM EDT
Recruiting Not applicable Interventional

Healthy Lifestyles in Bipolar Disorder: Bay Area Study

NCT06555406
View directory record Official record
Conditions
Bipolar Disorder, Time Restricted Eating
Interventions
Time-restricted eating for 8 weeks
Behavioral
Lead sponsor
University of California, Berkeley
Other
Eligibility
18 Years to 65 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Jan 14, 2026 · Synced Oct 11, 2026, 8:53 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Sleep and Circadian Treatments for Shift Workers

NCT03813654
View directory record Official record
Conditions
Shift-Work Sleep Disorder, Shift-Work Related Sleep Disturbance
Interventions
8-h Afternoon-Evening Sleep, 8-h Free Sleep
Behavioral
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years to 65 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 15, 2025 · Synced Oct 11, 2026, 8:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sleep Duration Required to Restore Performance During Chronic Sleep Restriction

NCT01581125
View directory record Official record
Conditions
Sleep, Sleep Deprivation, Insufficient Sleep Syndrome
Interventions
Sleep:wake 1, Sleep:wake 2
Behavioral
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 35 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 18, 2016 · Synced Oct 11, 2026, 8:53 PM EDT
Completed Phase 4 Interventional

Lemborexant in Delayed Sleep Phase Syndrome

NCT05463861
View directory record Official record
Conditions
Delayed Sleep Phase Syndrome
Interventions
Lemborexant, Placebo
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
71 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Redwood City, California
Source: ClinicalTrials.gov public record
Updated Mar 2, 2026 · Synced Oct 11, 2026, 8:53 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Effectiveness of Combining Light and Non-Light Treatments for Jet Lag and Sleep Disorders

NCT00387179
View directory record Official record
Conditions
Sleep Disorders, Circadian Rhythm
Interventions
Melatonin, Methylxanthine, Light Therapy
Drug · Procedure
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years to 40 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2010
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 25, 2009 · Synced Oct 11, 2026, 8:53 PM EDT
Completed Not applicable Interventional

Melatonin Effects on Sleep and Circadian Rhythm in Youth and Young Adults With At-risk Symptoms

NCT03826563
View directory record Official record
Conditions
Psychosis, Sleep
Interventions
oral melatonin tablets (NatureMade brand), Placebo
Drug · Other
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
11 Years to 30 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 9, 2023 · Synced Oct 11, 2026, 8:53 PM EDT
Completed Phase 1 Interventional

Sleep Enhancement Training Study for Experienced Shiftworkers

NCT00786357
View directory record Official record
Conditions
Shift-Work Sleep Disorder
Interventions
NIOSH shiftwork booklet, Sleep Enhancement Training System
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
40 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 23, 2010 · Synced Oct 11, 2026, 8:53 PM EDT
Completed Not applicable Interventional

Implementing and Sustaining a Transdiagnostic Sleep and Circadian Treatment

NCT03556878
View directory record Official record
Conditions
Sleep Disorders, Circadian Rhythm, Sleep Disorder, Acceptability, Feasibility, Adaptation, Implementation Research
Interventions
Fitted Transdiagnostic Sleep and Circadian intervention
Behavioral
Lead sponsor
University of California, Berkeley
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Apr 22, 2019 · Synced Oct 11, 2026, 8:53 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Effect of Night Float Call on Sleep and Activity Patterns Among Anesthesia Residents

NCT05043038
View directory record Official record
Conditions
Sleep Disorder, Shift Work, Fatigue, Sleep Disturbance
Interventions
Not listed
Lead sponsor
Stanford University
Other
Eligibility
Not listed
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2024
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Dec 18, 2024 · Synced Oct 11, 2026, 8:53 PM EDT
Terminated Not applicable Interventional Results available

Young Blind Child Melatonin Treatment Study

NCT00688935
View directory record Official record
Conditions
Blindness
Interventions
Melatonin
Biological
Lead sponsor
Oregon Health and Science University
Other
Eligibility
1 Year to 20 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2015
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Nov 27, 2019 · Synced Oct 11, 2026, 8:53 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Safety and Efficacy of Ramelteon in Healthy Subjects

NCT00671190
View directory record Official record
Conditions
Sleep Disorder
Interventions
Ramelteon, Placebo
Drug
Lead sponsor
Takeda
Industry
Eligibility
18 Years to 45 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005
U.S. locations
13
States / cities
Hot Springs, Arkansas • Los Angeles, California • San Diego, California + 10 more
Source: ClinicalTrials.gov public record
Updated Feb 28, 2012 · Synced Oct 11, 2026, 8:53 PM EDT
Completed Phase 4 Interventional Results available

Ramelteon in the Treatment of Sleep and Mood in Patients With Seasonal Affective Disorder

NCT00502320
View directory record Official record
Conditions
Seasonal Affective Disorder
Interventions
Ramelteon, Placebo
Drug
Lead sponsor
Lehigh Valley Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Allentown, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 6, 2009 · Synced Oct 11, 2026, 8:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Teen Sleep Health Study

NCT04087603
View directory record Official record
Conditions
Sleep Disorders, Circadian Rhythm, Adolescent Behavior
Interventions
Weekend Morning Bright Light & Early Bedtime
Behavioral
Lead sponsor
Rush University Medical Center
Other
Eligibility
14 Years to 17 Years
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 19, 2019 · Synced Oct 11, 2026, 8:53 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Sleep and Circadian Contributions to Nighttime Blood Pressure

NCT05656768
View directory record Official record
Conditions
Sleep, Circadian Rhythm, Blood Pressure, Hypertension
Interventions
Constant Routine Protocol
Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years and older
Enrollment
1,427 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jan 29, 2026 · Synced Oct 11, 2026, 8:53 PM EDT
Completed Not applicable Interventional

Effect of Therapeutic Light on Sleep, Circadian Rhythm, and Global Function in Women With Alzheimer's

NCT02502045
View directory record Official record
Conditions
Alzheimer's Disease
Interventions
Morning Simulated Sunlight, Non-therapeutic Red Light
Device
Lead sponsor
Yale University
Other
Eligibility
65 Years and older · Female only
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Farmington Hills, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 20, 2017 · Synced Oct 11, 2026, 8:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Circadian Rhythms and Cardiovascular Risk

NCT02202811
View directory record Official record
Conditions
Obstructive Sleep Apnea
Interventions
Forced Desynchrony
Behavioral
Lead sponsor
Oregon Health and Science University
Other
Eligibility
40 Years to 80 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jul 2, 2025 · Synced Oct 11, 2026, 8:53 PM EDT