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ClinicalTrials.gov public records Last synced Oct 5, 2026, 5:11 AM EDT

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Showing 49–72 of 155 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Circadian Rhythm Sleep Disorders Clear all
Completed No phase listed Observational Accepts healthy volunteers

Evaluation of the Reliability and Validity of a Diagnostic Sleep Disorders Questionnaire

NCT03468400
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 22, 2020 · Synced Oct 5, 2026, 5:11 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Eating Behaviors in Shift Workers

NCT04468672
View directory record Official record
Conditions
Shift Work Type Circadian Rhythm Sleep Disorder, Eating Behavior
Interventions
Portion size
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
20 Years to 55 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 25, 2026 · Synced Oct 5, 2026, 5:11 AM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Mechanistic Studies of Psilocybin in Headache Disorders

NCT06464367
View directory record Official record
Conditions
Migraine
Interventions
Psilocybin, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
21 Years to 70 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 13, 2026 · Synced Oct 5, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Implementing and Sustaining a Sleep Treatment to Improve Community Mental Health Part 3: Sustainment

NCT05956678
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 10, 2024 · Synced Oct 5, 2026, 5:11 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Medications for Opioid Use Disorder Photosensitive Retinal Ganglion Cell Function, Sleep, and Circadian Rhythms: Implications for Treatment

NCT06104280
View directory record Official record
Conditions
Opioid Use Disorder, Sleep Disturbance
Interventions
Post-Illumination Pupillary Response (PIPR), Polysomnography, Multiple Sleep Latency Test, Ecological Momentary Assessments, Actigraphy, DLMO, Melatonin Suppression Test
Other · Behavioral · Device
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 80 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Oct 5, 2026, 5:11 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 17, 2024 · Synced Oct 5, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Glasses for Adolescent Delayed Sleep-Wake Phase Disorder

NCT04378933
View directory record Official record
Conditions
Delayed Sleep-Wake Phase Disorder
Interventions
Amber Glasses, Clear Lens Glasses
Device
Lead sponsor
Mayo Clinic
Other
Eligibility
14 Years to 17 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
2
States / cities
Chicago, Illinois • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 6, 2023 · Synced Oct 5, 2026, 5:11 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Does Fatigue Coaching Improve Functioning and Fatigue in Resident Night Shifts

NCT06100809
View directory record Official record
Conditions
Fatigue, Shift Work Type Circadian Rhythm Sleep Disorder
Interventions
Personalized coaching, Nutrition handout
Behavioral
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
Not listed
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 13, 2026 · Synced Oct 5, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Skeletal Response to Simulated Night Shift

NCT05074277
View directory record Official record
Conditions
Osteoporosis, Circadian Rhythm Sleep Disorder, Shift Work Type
Interventions
Simulated short term night shift work schedule
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
20 Years to 40 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Dec 22, 2025 · Synced Oct 5, 2026, 5:11 AM EDT
Completed Not applicable Interventional Results available

Sleep and Circadian Rhythms in Mechanically Ventilated Patients

NCT01276652
View directory record Official record
Conditions
Respiratory Failure, Critical Illness
Interventions
Environmental modification
Behavioral
Lead sponsor
University of Iowa
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2008
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 26, 2017 · Synced Oct 5, 2026, 5:11 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 17, 2026 · Synced Oct 5, 2026, 5:11 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Melatonin and Vaccine Response, Immunity, and Chronobiology Study

NCT04953754
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 10, 2023 · Synced Oct 5, 2026, 5:11 AM EDT
Completed Phase 1 Interventional

Sleep Enhancement Training Study for Novice Shiftworkers

NCT00786266
View directory record Official record
Conditions
Shift-Work Sleep Disorder
Interventions
Sleep Enhancement Training System, NIOSH shiftwork booklet
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
20 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 5, 2026, 5:11 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Safety and Efficacy of VEC-162 on Circadian Rhythm in Healthy Adult Volunteers

NCT00490945
View directory record Official record
Conditions
Circadian Rhythm Sleep Disorders
Interventions
VEC-162
Drug
Lead sponsor
Vanda Pharmaceuticals
Industry
Eligibility
18 Years to 50 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2005
U.S. locations
2
States / cities
Boston, Massachusetts • Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Aug 26, 2014 · Synced Oct 5, 2026, 5:11 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 3, 2016 · Synced Oct 5, 2026, 5:11 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Impact of Overnight Active Temperature Regulation on Gut Microbiome, Inflammation, and Circadian Rhythm.

NCT07848594
View directory record Official record
Conditions
Poor Sleep Quality, Gut Microbiome, Gut Health, Inflammation, Circadian Rhythm, Circadian Clocks, Gut Microbiota, Women's Health, Gut-Brain Axis, Blood Pressure, Systemic Inflammatory Response
Interventions
Overnight Active Temperature Regulation: Eight Sleep Pod System
Device
Lead sponsor
Eight Sleep Inc.
Industry
Eligibility
45 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Newton Center, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 30, 2026 · Synced Oct 5, 2026, 5:11 AM 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 5, 2026, 5:11 AM EDT
Completed Phase 3 Interventional

THRIVE Feasibility Trial

NCT05346588
View directory record Official record
Conditions
Surgery--Complications, Anesthesia Complication, Anesthesia Awareness, Anesthesia Emergence Delirium, Anesthesia, Surgery, Quality of Life, Pain, Postoperative, Nausea, Postoperative, Anesthesia Morbidity, Depression, Sleep Disorders, Circadian Rhythm
Interventions
Anesthetic technique Propofol TIVA, Anesthetic technique inhaled agent
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
4
States / cities
Stanford, California • Ann Arbor, Michigan • St Louis, Missouri + 1 more
Source: ClinicalTrials.gov public record
Updated Nov 24, 2023 · Synced Oct 5, 2026, 5:11 AM 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 5, 2026, 5:11 AM EDT
Recruiting Not applicable Interventional

Pupillometry in Delayed Sleep Wake Phase Disorder

NCT06949644
View directory record Official record
Conditions
Delayed Sleep-Wake Phase Disorder
Interventions
Light and Citalopram
Combination Product
Lead sponsor
Northwestern University
Other
Eligibility
16 Years and older
Enrollment
220 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Oct 5, 2026, 5:11 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Efficacy of Ramelteon on Insomnia Symptoms Associated With Jet Lag in Healthy Adult Volunteers

NCT00492011
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 28, 2012 · Synced Oct 5, 2026, 5:11 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Cannabis Effects on Sleep, Circadian Rhythms, and Light Sensitivity in Young Adults

NCT06743373
View directory record Official record
Conditions
Cannabis Use, Sleep, Circadian Rhythm
Interventions
Cannabis Discontinuation
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 25 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 6, 2026 · Synced Oct 5, 2026, 5:11 AM EDT
Completed Not applicable Interventional

Relieving Pain and Improving Sleep: Evaluating Topical Pain Relief and Sleep Patches

NCT06505005
View directory record Official record
Conditions
Pain, Back, Pain, Acute, Sleep Disorder, Sleep Disorders, Circadian Rhythm, Sleep, Sleep Deprivation, Insomnia
Interventions
Drug- free, non-invasive patch (FREEDOM or REM Patch) with haptic vibrotactile trigger technology (VTT) Other Names:, Sham Patch without haptic vibrotactile trigger technology (VTT)
Device
Lead sponsor
SuperPatch Limited LLC
Industry
Eligibility
18 Years to 65 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Tyrone, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 20, 2026 · Synced Oct 5, 2026, 5:11 AM EDT
Recruiting Not applicable Interventional

Phase 2 - Rhythmic Light Therapy for Alzheimer's Disease Patients

NCT05016219
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
Circadian-Effective Light, Rhythmic Light, Placebo Light, Placebo Rhythmic Light
Device
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
55 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
2
States / cities
Menands, New York • New York, New York
Source: ClinicalTrials.gov public record
Updated May 29, 2026 · Synced Oct 5, 2026, 5:11 AM EDT