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ClinicalTrials.gov public records Last synced Sep 29, 2026, 4:41 AM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Biological Clock Disturbance Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Validating the Use of a Subjectively Reported Sleep Vital Sign

NCT03018912
View directory record Official record
Conditions
Obstructive Sleep Apnea (OSA), Insomnia, Restless Leg Syndrome (RLS), Hypersomnia Type; Sleep Disorder, Shift Work Sleep Disorders
Interventions
Sleep VS
Other
Lead sponsor
Kaiser Permanente
Other
Eligibility
18 Years and older
Enrollment
1,260 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Fontana, California
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Sep 29, 2026, 4:41 AM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety of Circadin® in the Treatment of Sleep Disturbances in Children With Neurodevelopment Disabilities

NCT01906866
View directory record Official record
Conditions
Sleep Disorders
Interventions
Circadin 2/5/10 mg, Placebo
Drug
Lead sponsor
Neurim Pharmaceuticals Ltd.
Industry
Eligibility
2 Years to 17 Years
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
18
States / cities
Phoenix, Arizona • Miami Lakes, Florida • Orange City, Florida + 14 more
Source: ClinicalTrials.gov public record
Updated Apr 22, 2024 · Synced Sep 29, 2026, 4:41 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Blueberry Consumption on Gastrointestinal Health

NCT03934177
View directory record Official record
Conditions
Obesity, Circadian Dysregulation
Interventions
Blueberry powder, Placebo powder
Dietary Supplement
Lead sponsor
University of Nebraska Lincoln
Other
Eligibility
19 Years to 70 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
2
States / cities
Lincoln, Nebraska • Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Mar 21, 2023 · Synced Sep 29, 2026, 4:41 AM EDT
Completed Not applicable Interventional

Improving Well-being by Improving Memory for Treatment for Sleep and Circadian Dysfunction

NCT04373538
View directory record Official record
Conditions
Sleep Disorder, Circadian Dysregulation
Interventions
Trans-C for sleep and circadian function + Memory Support
Behavioral
Lead sponsor
University of California, Berkeley
Other
Eligibility
55 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Sep 28, 2021 · Synced Sep 29, 2026, 4:41 AM EDT
Completed Not applicable Interventional

Effect of Sleep on the Recovery of Patients Admitted to the ICU

NCT04111900
View directory record Official record
Conditions
Critical Illness, Circadian Dysregulation, Delirium
Interventions
Sleep/Circadian Friendly
Behavioral
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 99 Years
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 17, 2023 · Synced Sep 29, 2026, 4:41 AM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Effect of Melatonin on Sleep Patterns of Resident Trainees During Night Float Shift

NCT05701969
View directory record Official record
Conditions
Sleep Disorders, Circadian Rhythm
Interventions
Melatonin, Placebo
Dietary Supplement · Other
Lead sponsor
University of Virginia
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2028
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated May 3, 2026 · Synced Sep 29, 2026, 4:41 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers Results available

Body Weight, Sleep, and Heart Health

NCT03388788
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 Sep 29, 2026, 4:41 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Maintaining Behavior Change: A 6-year Follow-up of Adolescent 'Night-owls'

NCT05098782
View directory record Official record
Conditions
Circadian Dysregulation
Interventions
Not listed
Lead sponsor
University of California, Berkeley
Other
Eligibility
Not listed
Enrollment
108 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Oct 6, 2022 · Synced Sep 29, 2026, 4:41 AM EDT
Completed Not applicable Interventional

A Pilot Test of Mood and Circadian Rhythm Mechanisms Driving Binge Eating

NCT03680989
View directory record Official record
Conditions
Eating Disorder, Binge Eating, Circadian Dysregulation
Interventions
Bright Light Exposure, Natural Light Exposure
Device
Lead sponsor
University of Wyoming
Other
Eligibility
18 Years and older · Female only
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Laramie, Wyoming
Source: ClinicalTrials.gov public record
Updated Nov 3, 2020 · Synced Sep 29, 2026, 4:41 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Comprehensive Police Fatigue Management Program

NCT00246051
View directory record Official record
Conditions
Sleep Disorders, Sleep Apnea, Obstructive, Restless Legs Syndrome, Sleep Disorders, Circadian Rhythm, Sleep Initiation and Maintenance Disorders
Interventions
Sleep Hygiene Education, Expert-Led Sleep Disorders Screening and Treatment, Online Sleep Disorders Screening
Behavioral · Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
683 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2010
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 14, 2013 · Synced Sep 29, 2026, 4:41 AM EDT
Terminated Phase 2 Interventional Results available

A Study to Assess the Wakefulness Promoting Effect, Safety, Tolerability, and Pharmacokinetics (PK) of LML134 in Shift Work Disorder

NCT03141086
View directory record Official record
Conditions
Circadian Rhythm Disorders
Interventions
LML134, Placebo
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
8
States / cities
Los Angeles, California • San Diego, California • Miami, Florida + 5 more
Source: ClinicalTrials.gov public record
Updated Jan 4, 2021 · Synced Sep 29, 2026, 4:41 AM 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 22, 2010 · Synced Sep 29, 2026, 4:41 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Body Clocks - Coordination of Peripheral and Central Oscillators

NCT07459764
View directory record Official record
Conditions
Circadian Dysregulation
Interventions
Not listed
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 30 Years · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 29, 2026, 4:41 AM EDT
Active, not recruiting Phase 3 Interventional

Evaluating the Effects of Tasimelteon vs. Placebo in Delayed Sleep-Wake Phase Disorder (DSWPD)

NCT04652882
View directory record Official record
Conditions
Sleep Wake Disorders, Sleep Disorders, Circadian Rhythm, Chronobiology Disorders
Interventions
Tasimelteon, Placebo
Drug
Lead sponsor
Vanda Pharmaceuticals
Industry
Eligibility
18 Years to 75 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
11
States / cities
Los Angeles, California • Redwood City, California • Aurora, Colorado + 8 more
Source: ClinicalTrials.gov public record
Updated Jul 26, 2026 · Synced Sep 29, 2026, 4:41 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin B12 on the Body's Internal Clock

NCT00120484
View directory record Official record
Conditions
Sleep Disorders, Circadian Rhythm
Interventions
Vitamin B12
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 30 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 13, 2010 · Synced Sep 29, 2026, 4:41 AM EDT
Completed Not applicable Interventional Results available

Feasibility Pilot of Bright Light in the Intensive Care Unit

NCT03568045
View directory record Official record
Conditions
Circadian Rhythm Sleep Disorder, Unspecified
Interventions
standard light, 10,000 lux bright light, 4 hours, 10,000 lux bright light, 8 hours
Device
Lead sponsor
Yale University
Other
Eligibility
50 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jun 16, 2024 · Synced Sep 29, 2026, 4:41 AM EDT
Recruiting Not applicable Interventional

Feasibility of Light Therapy in the Pediatric Intensive Care Unit (ICU)

NCT07384585
View directory record Official record
Conditions
Circadian Dysregulation, Light Exposure, Pediatric Critical Illness
Interventions
Light Therapy
Other
Lead sponsor
Laura Beth Kalvas
Other
Eligibility
4 Years to 17 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 21, 2026 · Synced Sep 29, 2026, 4:41 AM EDT
Completed Phase 3 Interventional Results available

The Clinical Utility of Measuring the Circadian Clock in Treatment of Delayed Sleep-Wake Phase Disorder

NCT03715465
View directory record Official record
Conditions
Delayed Sleep Phase Syndrome
Interventions
Melatonin 0.5 MG, Dim Light Melatonin Onset (salivary)
Drug · Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 65 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 24, 2022 · Synced Sep 29, 2026, 4:41 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Timing of Sodium Intake and Nocturnal Sodium Excretion and Blood Pressure in Obese African Americans

NCT04021355
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
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 29, 2026, 4:41 AM EDT
Recruiting Not applicable Interventional

A Pilot of a Personalized Circadian mHealth to Improve Sleep in Night Shift Workers

NCT06809335
View directory record Official record
Conditions
Shift Work Sleep Disorder
Interventions
Personalized circadian mHealth
Other
Lead sponsor
Henry Ford Health System
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Novi, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 1, 2026 · Synced Sep 29, 2026, 4:41 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Pathophysiology of Circadian Rhythm Delayed Sleep Wake Phase Disorder

NCT06471374
View directory record Official record
Conditions
Delayed Sleep Phase Syndrome, Delayed Sleep Phase
Interventions
Circadian rhythm assessment, Light sensitivity assessment
Behavioral
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
16 Years to 40 Years
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
2
States / cities
Boulder, Colorado • Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 29, 2026, 4:41 AM EDT
Completed Not applicable Interventional Results available

Improving the Sleep and Circadian Rhythms of Mechanically Ventilated Patients

NCT01284140
View directory record Official record
Conditions
Critical Illness, Sleep Deprivation, Respiratory Failure, Sleep Disorders, Circadian Rhythm
Interventions
Sleep and circadian rhythm promotion, Usual care
Behavioral
Lead sponsor
Brian Gehlbach
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
2
States / cities
Chicago, Illinois • Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated May 6, 2018 · Synced Sep 29, 2026, 4:41 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Cardiometabolic Risk of Shiftwork

NCT01264913
View directory record Official record
Conditions
Sleep Deprivation, Circadian Dysregulation, Shift-Work Sleep Disorder
Interventions
sleep extension & circadian alignment
Behavioral
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 50 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 2, 2016 · Synced Sep 29, 2026, 4:41 AM EDT
Recruiting Not applicable Interventional

Effects of Blocking Blue Light at Night Post CABG, AVR, MVR, CABG AVR, CABG MVR, or SAH

NCT04578249
View directory record Official record
Conditions
Circadian Rhythm Disorders
Interventions
Blue light-blocking goggles, Clear goggles
Other
Lead sponsor
West Virginia University
Other
Eligibility
45 Years to 75 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Apr 19, 2026 · Synced Sep 29, 2026, 4:41 AM EDT