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ClinicalTrials.gov public records Last synced May 21, 2026, 8:08 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 60 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Circadian Dysregulation Clear all
Not listed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Vaccine Response, Sleep, Circadian Rhythm Disorders
Interventions
Melatonin, Phillips Actiwatch Spectrum Plus
Dietary Supplement · Device
Lead sponsor
Walter Reed National Military Medical Center
Federal
Eligibility
18 Years to 64 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 9, 2023 · Synced May 21, 2026, 8:08 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Chronobiology Disorders, Circadian Rhythm Disorders, Sleep Disorders, Circadian Rhythm
Interventions
light exposure
Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
21 Years to 30 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 30, 2021 · Synced May 21, 2026, 8:08 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
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 Dec 17, 2025 · Synced May 21, 2026, 8:08 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Obesity, Hypertension, Circadian Dysregulation, Salt; Excess
Interventions
Oral sodium supplementation
Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
25 Years to 45 Years
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Dec 16, 2025 · Synced May 21, 2026, 8:08 PM EDT
Recruiting Not applicable Interventional
View directory record Official record
Conditions
Suicidal Ideation, Circadian Rhythm Disorders, Sleep Deprivation, Sleep Wake Disorders
Interventions
Sleep Pressure Manipulation
Behavioral
Lead sponsor
University of Arizona
Other
Eligibility
18 Years to 55 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced May 21, 2026, 8:08 PM EDT
Withdrawn Not applicable Interventional
View directory record Official record
Conditions
Huntington's Disease, Parkinson's Disease, Dementia With Lewy Bodies, Sleep Disorders, Circadian Dysregulation
Interventions
Ramelteon, Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
20 Years to 90 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 5, 2012 · Synced May 21, 2026, 8:08 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Sleep Apnea Syndromes, Insomnia, Insufficient Sleep Syndrome, Circadian Rhythm Disorders
Interventions
Not listed
Lead sponsor
Dayzz Live Well Ltd.
Industry
Eligibility
21 Years to 65 Years
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 21, 2020 · Synced May 21, 2026, 8:08 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Sleep, Circadian Dysregulation, Mood
Interventions
Light
Device
Lead sponsor
VA Palo Alto Health Care System
Federal
Eligibility
18 Years to 35 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Mar 29, 2021 · Synced May 21, 2026, 8:08 PM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
Sleep Disorder, Circadian Dysregulation
Interventions
Standard Transdiagnostic Intervention for Sleep and Circadian Dysfunction (TranS-C), Adapted Transdiagnostic Intervention for Sleep and Circadian Dysfunction (TranS-C), Usual Care Delayed Treatment
Behavioral · Other
Lead sponsor
University of California, Berkeley
Other
Eligibility
18 Years and older
Enrollment
489 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
10
States / cities
Concord, California • Fairfield, California • Goleta, California + 7 more
Source: ClinicalTrials.gov public record
Updated Oct 26, 2025 · Synced May 21, 2026, 8:08 PM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
Cancer-related Problem/Condition, Depression, Circadian Rhythm Disorders
Interventions
PEI Experimental Light, Comparison Light
Device
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
21 Years and older
Enrollment
73 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 10, 2020 · Synced May 21, 2026, 8:08 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Circadian Dysregulation
Interventions
Habit-based Sleep Health Intervention, Text messaging intervention
Behavioral
Lead sponsor
University of California, Berkeley
Other
Eligibility
18 Years to 30 Years
Enrollment
160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Nov 4, 2025 · Synced May 21, 2026, 8:08 PM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
Depression, Postpartum Depression, Prenatal Disorder, Circadian Dysregulation, Pregnancy Related, Sleep Disturbance
Interventions
Personalized Integrated Chronotherapy
Behavioral
Lead sponsor
Rhode Island Hospital
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
3
States / cities
Glen Oaks, New York • Chapel Hill, North Carolina • Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Dec 8, 2025 · Synced May 21, 2026, 8:08 PM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Circadian Rhythm Disorders
Interventions
Daytime Bright Light, Usual Light
Device
Lead sponsor
Yale University
Other
Eligibility
50 Years and older
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated May 22, 2024 · Synced May 21, 2026, 8:08 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers Results available
View directory record Official record
Conditions
Cardiovascular Risk Factor, Circadian Dysregulation, Obesity
Interventions
Positron Emission Tomography (PET) scanning of cardiac function at 3 time points across the 24 hour circadian cycle
Combination Product
Lead sponsor
Oregon Health and Science University
Other
Eligibility
25 Years to 65 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2026
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated May 17, 2026 · Synced May 21, 2026, 8:08 PM EDT
Recruiting Not applicable Interventional
View directory record Official record
Conditions
Circadian Dysrhythmia, Sleep Disturbance, Critical Illness, Children, Only
Interventions
Daytime light exposure, Daytime restricted feeding
Other
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
3 Years to 6 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Mar 22, 2026 · Synced May 21, 2026, 8:08 PM EDT
Completed Phase 3 Interventional Results available
View directory record Official record
Conditions
Narcolepsy, Sleep Apnea, Obstructive, Sleep Apnea Syndromes, Shift-Work Sleep Disorder
Interventions
CEP-10953 (Armodafinil)
Drug
Lead sponsor
Cephalon
Industry
Eligibility
18 Years to 65 Years
Enrollment
328 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
41
States / cities
Peoria, Arizona • Phoenix, Arizona • Tucson, Arizona + 35 more
Source: ClinicalTrials.gov public record
Updated Jul 18, 2013 · Synced May 21, 2026, 8:08 PM EDT
Completed Phase 3 Interventional
View directory record Official record
Conditions
Non-24-Hour Sleep-Wake Disorder
Interventions
tasimelteon
Drug
Lead sponsor
Vanda Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
22
States / cities
Phoenix, Arizona • Orange, California • Palo Alto, California + 19 more
Source: ClinicalTrials.gov public record
Updated Apr 20, 2015 · Synced May 21, 2026, 8:08 PM EDT
Completed Not applicable Interventional
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 21, 2019 · Synced May 21, 2026, 8:08 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Sleep Wake Disorders, Circadian Rhythm Disorders
Interventions
Standard Transdiagnostic Intervention for Sleep and Circadian Dysfunction (TranS-C), Adapted Transdiagnostic Intervention for Sleep and Circadian Dysfunction (TranS-C)
Behavioral
Lead sponsor
University of California, Berkeley
Other
Eligibility
18 Years and older
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
10
States / cities
Concord, California • Fairfield, California • Goleta, California + 7 more
Source: ClinicalTrials.gov public record
Updated May 9, 2024 · Synced May 21, 2026, 8:08 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers
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 2, 2025 · Synced May 21, 2026, 8:08 PM EDT
Completed Phase 3 Interventional Results available
View directory record Official record
Conditions
Non-24-Hour Sleep-Wake Disorder
Interventions
tasimelteon, Placebo
Drug
Lead sponsor
Vanda Pharmaceuticals
Industry
Eligibility
Not listed
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
22
States / cities
Phoenix, Arizona • Orange, California • Palo Alto, California + 19 more
Source: ClinicalTrials.gov public record
Updated Oct 9, 2014 · Synced May 21, 2026, 8:08 PM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Circadian Rhythm Disorders, Sleep
Interventions
Bright Light
Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
Not listed
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 13, 2018 · Synced May 21, 2026, 8:08 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Circadian Dysregulation
Interventions
Ramelteon, Placebo
Drug
Lead sponsor
Takeda
Industry
Eligibility
18 Years to 50 Years
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
4
States / cities
Miami, Florida • Pembroke Pines, Florida • Honolulu, Hawaii + 1 more
Source: ClinicalTrials.gov public record
Updated Feb 27, 2012 · Synced May 21, 2026, 8:08 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Sleep, Metabolism Changes, Circadian Rhythm, Lifestyle Factors, Sleep Hygiene, Sleep Hygiene, Inadequate, Sleep Deprivation, Insufficient Sleep, Circadian Misalignment, Circadian Dysregulation, Light Exposure
Interventions
Central Clock Misalignment, Peripheral Misalignment
Behavioral
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 35 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2031
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 21, 2026 · Synced May 21, 2026, 8:08 PM EDT