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Showing 1–24 of 205 matching trials from the live ClinicalTrials.gov search.
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Recruiting Phase 4 Interventional

CLOZAPINE Response in Biotype-1

NCT04580134
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder, Bipolar 1 Disorder
Interventions
clozapine, risperidone
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
524 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
5
States / cities
Hartford, Connecticut • Athens, Georgia • Chicago, Illinois + 2 more
Source: ClinicalTrials.gov public record
Updated May 10, 2026 · Synced Sep 6, 2026, 6:42 AM EDT
Not yet recruiting Not applicable Interventional

Circadian Light Exposure Adjustment for Restfulness

NCT07391852
View directory record Official record
Conditions
Sleep Onset Latency
Interventions
Amber Tinted Glasses, Clear Glasses, Smart Lightbulbs
Device
Lead sponsor
University of Arizona
Other
Eligibility
60 Months to 83 Months
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Sep 6, 2026, 6:42 AM EDT
Completed Phase 4 Interventional Results available

Total Joint Arthroplasty and Sleep

NCT03968939
View directory record Official record
Conditions
Primary Total Hip Arthroplasty, Primary Total Knee Arthroplasty
Interventions
Diphenhydramine (Benadryl), Melatonin, Sleep Hygiene Education
Drug · Dietary Supplement · Behavioral
Lead sponsor
James A. Keeney
Other
Eligibility
18 Years and older
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 15, 2024 · Synced Sep 6, 2026, 6:42 AM EDT
Completed Not applicable Interventional Results available

A SMART Design to Improve Sleep Disturbance in Adolescents With Neurodevelopmental Disorders

NCT03730194
View directory record Official record
Conditions
Autism Spectrum Disorder, Attention Deficit Hyperactivity Disorder, Sleep Disturbance
Interventions
Melatonin, Bedtime Bank
Dietary Supplement · Behavioral
Lead sponsor
University of Nebraska
Other
Eligibility
10 Years to 18 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Dec 21, 2023 · Synced Sep 6, 2026, 6:42 AM EDT
Terminated Phase 3 Interventional Results available

Ramelteon for Insomnia Comorbid With Asthma

NCT00869167
View directory record Official record
Conditions
Insomnia, Asthma
Interventions
Ramelteon
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 60 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 30, 2013 · Synced Sep 6, 2026, 6:42 AM EDT
Completed Phase 2 Interventional

RECOVER-SLEEP: Platform Protocol

NCT06404086
View directory record Official record
Conditions
Long COVID, Long COVID-19, Hypersomnia, Sleep Disturbance
Interventions
Modafinil, Modafinil Placebo, Solriamfetol, Solriamfetol Placebo, Melatonin, Melantonin Placebo, Tailored lighting (TL) Active, Tailored lighting (TL) Placebo
Drug · Device
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
830 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
47
States / cities
Phoenix, Arizona • Tucson, Arizona • Palo Alto, California + 31 more
Source: ClinicalTrials.gov public record
Updated Jan 21, 2026 · Synced Sep 6, 2026, 6:42 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Effects of Sex Hormones on Circadian Rhythm in Men and Women

NCT00001285
View directory record Official record
Conditions
Bipolar Disorder, Circadian Rhythm, Depressive Disorder
Interventions
Not listed
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
Female only
Enrollment
73 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1991 – 2000
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 6, 2026, 6:42 AM EDT
Withdrawn Phase 1 Interventional

Melatonin Treatment for Newborn Infants With Moderate to Severe Hypoxic Ischemic Encephalopathy

NCT01904786
View directory record Official record
Conditions
Newborn Hypoxic Ischemic Encephalopathy
Interventions
Melatonin, placebo
Drug
Lead sponsor
St. Louis University
Other
Eligibility
1 Hour to 8 Hours
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 2, 2015 · Synced Sep 6, 2026, 6:42 AM EDT
Completed Not applicable Interventional

Melatonin for Huntington's Disease (HD) Gene Carriers With HD Related Sleep Disturbance - a Pilot Study

NCT04421339
View directory record Official record
Conditions
Huntington Disease
Interventions
Melatonin, Placebo
Dietary Supplement · Other
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 75 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 14, 2023 · Synced Sep 6, 2026, 6:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Investigating the Effects of Evening Light Exposure on Melatonin Suppression, Alertness and Nocturnal Sleep

NCT01586039
View directory record Official record
Conditions
Non-visual Photoreception
Interventions
Visible light
Device
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 30 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 13, 2021 · Synced Sep 6, 2026, 6:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Commercial "Sleep Lotion" on Salivary Melatonin Levels and Sleep Quality in Undergraduates

NCT06053385
View directory record Official record
Conditions
Sleep
Interventions
Melatonin sleep lotion, Placebo control lotion
Other
Lead sponsor
University of Redlands
Other
Eligibility
18 Years to 24 Years
Enrollment
63 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Redlands, California
Source: ClinicalTrials.gov public record
Updated Sep 27, 2023 · Synced Sep 6, 2026, 6:42 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Functional Melatonin Replacement for Sleep Disruptions in Individuals With Tetraplegia

NCT00507546
View directory record Official record
Conditions
Insomnia, Spinal Cord Injury, Tetraplegia, Sleep Disorders
Interventions
Ramelteon, Placebo
Drug
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2011
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated May 21, 2014 · Synced Sep 6, 2026, 6:42 AM EDT
Recruiting Not applicable Interventional

Type 1 Diabetes REst for Metabolic Health

NCT06627504
View directory record Official record
Conditions
Type 1 Diabetes (T1D), Sleep Health
Interventions
Sleep Health and Circadian Timing Intervention
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
14 Years to 19 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Sep 6, 2026, 6:42 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Melatonin and Salt on Blood Vessel Function

NCT04325191
View directory record Official record
Conditions
Cardiovascular Risk Factor
Interventions
Melatonin, Placebo
Dietary Supplement · Other
Lead sponsor
University of Delaware
Other
Eligibility
18 Years to 45 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated Apr 27, 2021 · Synced Sep 6, 2026, 6:42 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 10, 2026 · Synced Sep 6, 2026, 6:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Seeing the World Through Assorted Glasses

NCT02483559
View directory record Official record
Conditions
Sleep
Interventions
Amber Lenses, Placebo Lenses
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 50 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 7, 2017 · Synced Sep 6, 2026, 6:42 AM EDT
Active, not recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

Treatment of Orthostatic Intolerance

NCT00262470
View directory record Official record
Conditions
Tachycardia, Chronic Orthostatic Intolerance
Interventions
Acetazolamide, Atomoxetine, NO Drug, Clonidine, Entacapone, Entacapone & Propranolol, Atomoxetine & Propranolol, Indomethacin, Mecamylamine, Isosorbide Dinitrate, Melatonin, Midodrine, Modafinil, Octreotide, Placebo, Propranolol, Modafinil & Propranolol, Sertraline, IV Saline, Drinking Water, Breathing Device, memantine, Abdominal binder
Drug · Other · Dietary Supplement + 3 more
Lead sponsor
Satish R. Raj
Other
Eligibility
18 Years to 70 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1997 – 2029
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 7, 2025 · Synced Sep 6, 2026, 6:42 AM EDT
Completed Phase 1 Interventional

Treatment Strategies for Children With Smith-Magenis Syndrome

NCT00506259
View directory record Official record
Conditions
Developmental Delay Disorders, Chromosome Deletion, Mental Retardation, Sleep Disorders, Circadian Rhythm, Self Injurious Behavior
Interventions
dTR Melatonin (NIH CC PDS), Phototherapy (Bright Light), Melatonin CR
Drug · Device
Lead sponsor
National Human Genome Research Institute (NHGRI)
NIH
Eligibility
3 Years to 45 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2018
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 11, 2019 · Synced Sep 6, 2026, 6:42 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Preoperative Melatonin to Decrease Analgesia Usage After Third Molar Surgery

NCT04791943
View directory record Official record
Conditions
Pain, Postoperative, Narcotic Use
Interventions
Melatonin 10 MG, Lactose pill
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years to 35 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jan 29, 2026 · Synced Sep 6, 2026, 6:42 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Melatonin and Nighttime Blood Pressure in African Americans-8 mg Study

NCT01114360
View directory record Official record
Conditions
Hypertension
Interventions
Melatonin, Placebo
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years to 64 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Dec 17, 2015 · Synced Sep 6, 2026, 6:42 AM EDT
Terminated Not applicable Interventional

Does Melatonin Affect Anesthetic MAC (Minimum Alveolar Concentration)?

NCT03241004
View directory record Official record
Conditions
Anesthesia
Interventions
Sleep Mask
Other
Lead sponsor
Englewood Hospital and Medical Center
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Englewood, New Jersey
Source: ClinicalTrials.gov public record
Updated Aug 19, 2021 · Synced Sep 6, 2026, 6:42 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 26, 2019 · Synced Sep 6, 2026, 6:42 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Melatonin Agonist Effects of Tasimelteon Versus Placebo in Patients With Major Depressive Disorder

NCT01428661
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
tasimelteon, placebo
Drug
Lead sponsor
Vanda Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years
Enrollment
507 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
40
States / cities
Garden Grove, California • Irvine, California • Los Alamitos, California + 36 more
Source: ClinicalTrials.gov public record
Updated Jun 18, 2015 · Synced Sep 6, 2026, 6:42 AM EDT
Terminated Phase 2 Interventional

Randomized Controlled Trial to Assess Efficacy of Melatonin for Children During Burn Rehabilitation

NCT01598259
View directory record Official record
Conditions
Burns
Interventions
Melatonin, placebo
Drug · Other
Lead sponsor
Shriners Hospitals for Children
Other
Eligibility
5 Years to 22 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 27, 2016 · Synced Sep 6, 2026, 6:42 AM EDT