| Active Not Recruiting | Improvement of Sleep Disorders in Patients With Alzheimer's Disease After Sunlight Exposure Therapy. NCT07386808 | National Taiwan University Hospital | N/A |
| Not Yet Recruiting | Evaluating the Efficacy and Safety of PROSOMNIA Sleep Therapy™ in Patients With Sleep Deprivation and Chronic NCT06644573 | Nyree Penn | Phase 1 |
| Not Yet Recruiting | A Prospective Study: the Impact of Sleep Disturbances on Immunotherapy in Patients With Lung Cancer NCT06953765 | Shanghai Zhongshan Hospital | — |
| Not Yet Recruiting | Study of Sleep Quality in the Intensive Care Unit and Association with Weaning from Invasive Ventilation in Pa NCT06653933 | University Hospital, Grenoble | — |
| Recruiting | Evaluating the Effects of Tasimelteon Vs. Placebo in Delayed Sleep-Wake Phase Disorder (DSWPD) and the CRY1Δ11 NCT06701396 | Vanda Pharmaceuticals | Phase 3 |
| Enrolling By Invitation | Relieving Pain and Improving Sleep: Evaluating Topical Pain Relief and Sleep Patches NCT06505005 | SuperPatch Limited LLC | N/A |
| Not Yet Recruiting | Sleep-Wake Patterns on Illness Trajectories and Treatment Response in MDD NCT06181110 | Chinese University of Hong Kong | N/A |
| Not Yet Recruiting | Longitudinal Ecological Study on Sleep-Wake Patterns in MDD Using Actigraphy NCT06233422 | Chinese University of Hong Kong | — |
| Enrolling By Invitation | Adult Sleep Health in the Rural Appalachia and Mississippi Delta Region and Its Relationships With Cardiometab NCT06336525 | Brigham and Women's Hospital | — |
| Completed | Measuring the Effectiveness of Forest Therapy to Alleviate Stress Among International Students NCT06792656 | International Nature and Forest Therapy Alliance | N/A |
| Completed | The Effect of Oral Feeding Model With a Chronobiological Approach in Neonates NCT06821672 | Istanbul Bilgi University | N/A |
| Recruiting | Electroencephalography and Sleep Quality With Lormetazepam in the Intensive Care Unit NCT06473415 | Charite University, Berlin, Germany | — |
| Recruiting | Effects of Delayed School Start Times on Sleep, Mental Health, and Academic Performance Among Norwegian Adoles NCT06657482 | University of Bergen | N/A |
| Completed | High-frequency tRNS for Sleep Disturbances in Neurocognitive Disorders Due to Vascular Disease NCT06169254 | Chinese University of Hong Kong | N/A |
| Completed | WEsleep Trial: Improving Sleep in Hospitalized Patients NCT05683483 | Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) | N/A |
| Completed | Sleep Disorders, Chronotype, and Functional Impairment in the Restrictive ADHD Phenotype NCT06970418 | Dr. Behcet Uz Children's Hospital | — |
| Completed | Feasibility Study on the Use of Redormin®500 on Day-time Cognition NCT05684523 | Max Zeller Soehne AG | Phase 4 |
| Completed | THRIVE Feasibility Trial NCT05346588 | Washington University School of Medicine | Phase 3 |
| Unknown | Effect of Melatonin on Sleep Patterns of Resident Trainees During Night Float Shift NCT05701969 | University of Virginia | EARLY_Phase 1 |
| Completed | Changes in Circadian Rhythm After Anaesthesia in Children NCT05618405 | Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) | — |
| Recruiting | The Role of Circadian Factors in Regulation of Neuroplasticity in Ischemic Stroke (Interventional) NCT05247125 | Federal State Budgetary Institution, V. A. Almazov Federal North-West Medical Research Centre, of the Ministry of Health | Phase 4 |
| Unknown | Effect of Owning a Service Dog on Military Veterans With PTSD NCT05208008 | University of Aarhus | — |
| Not Yet Recruiting | Influence of Circadian Clock on Hormonal, Metabolic, Neurocognitive Markers in Adolescents With and Without Di NCT04054934 | Assaf-Harofeh Medical Center | — |
| Completed | Validation of Circadian Biomarkers in Patients With Sleep Disorders NCT04690504 | Brigham and Women's Hospital | — |
| Withdrawn | Lifestyle Medicine Strategies for Combating Sleepiness and Fatigue in Professional Drivers NCT05096130 | University of Thessaly | N/A |
| Terminated | Biomarkers for Circadian Timing in Healthy Adults NCT03956745 | Brigham and Women's Hospital | — |
| Terminated | Breath Biomarkers for Sleep Loss and Circadian Timing NCT03980340 | Brigham and Women's Hospital | — |
| Recruiting | Evaluating the Effects of Tasimelteon vs. Placebo in Delayed Sleep-Wake Phase Disorder (DSWPD) NCT04652882 | Vanda Pharmaceuticals | Phase 3 |
| Completed | Bright Light Intervention to Reduce Students' Stress NCT04900675 | Universitaet Innsbruck | N/A |
| Completed | Vestibular Nerve Stimulation to Improve Sleep NCT04219566 | Neurovalens Ltd. | N/A |
| Unknown | General Versus Regional Anesthesia and Postoperative Sleep Quality NCT03843645 | Aretaieion University Hospital | N/A |
| Unknown | The Efficacy of Melatonin in the Burning Mouth Syndrome NCT03788733 | Universidad de Murcia | N/A |
| Completed | Implementing and Sustaining a Transdiagnostic Sleep and Circadian Treatment NCT03556878 | University of California, Berkeley | N/A |
| Unknown | Nursing Activity and Quality of Hospitalized Patients' Sleep NCT03370354 | Central Hospital, Nancy, France | — |
| Completed | Sleep State in Lung Cancer: A Retrospective Analysis NCT06953492 | Shanghai Zhongshan Hospital | — |
| Completed | ROOM-LIGHT: Dynamic LED-light as Treatment for Depressed Patients in Inpatient Wards NCT03363529 | University Hospital Bispebjerg and Frederiksberg | N/A |
| Completed | The Impact of Night Float on Anesthesiology Resident Sleep Patterns NCT03325244 | University of Virginia | — |
| Completed | Teen Sleep Health Study NCT04087603 | Rush University Medical Center | N/A |
| Terminated | The BEST Study: The Efficacy of Brain Entrainment Sleep Technology in Military Healthcare Beneficiaries NCT03169309 | Landstuhl Regional Medical Center | N/A |
| Completed | Melatonin as a Circadian Clock Regulator, Neuromodulator and Myelo-protector in Adjuvant Breast Cancer Chemoth NCT03205033 | Hospital de Clinicas de Porto Alegre | Phase 2 |
| Unknown | Cognitive Behavioral Therapy for Insomnia Among Different Types of Shift Workers NCT02523079 | Finnish Institute of Occupational Health | N/A |
| Completed | Circadian Phase Adjustment and Improvement of Metabolic Control in Night Shift Workers NCT02108353 | Universitätsklinikum Hamburg-Eppendorf | Phase 3 |
| Unknown | Early Development of Sleep-wake Cycles in Premature Infants and Its Impact on Neurodevelopmental Outcome NCT01774318 | Medical University of Vienna | N/A |
| Completed | Sleep Wake and Melatonin Pattern in Craniopharyngioma NCT01881854 | Rigshospitalet, Denmark | — |
| Completed | Improving the Sleep and Circadian Rhythms of Mechanically Ventilated Patients NCT01284140 | Brian Gehlbach | N/A |
| Completed | Study of Sleep and Delirium in the Intensive Care Unit (ICU) NCT01280097 | University of California, San Francisco | — |
| Completed | Light Sensitization Study NCT01327040 | Brigham and Women's Hospital | N/A |
| Completed | Actigraphic Analysis of Treatment Response NCT00723580 | Child Psychopharmacology Institute | N/A |
| Completed | Efficacy of Ramelteon on Speeding Up Sleep in Subjects With Delayed Sleep Phase Syndrome NCT00593736 | Takeda | Phase 2 |
| Completed | Treatment Strategies for Children With Smith-Magenis Syndrome NCT00506259 | National Human Genome Research Institute (NHGRI) | Phase 1 |
| Unknown | Effectiveness of Combining Light and Non-Light Treatments for Jet Lag and Sleep Disorders NCT00387179 | National Heart, Lung, and Blood Institute (NHLBI) | N/A |
| Completed | Comprehensive Police Fatigue Management Program NCT00246051 | Brigham and Women's Hospital | N/A |
| Completed | Sleep Disorders Management, Health and Safety in Police NCT00207285 | Brigham and Women's Hospital | N/A |
| Completed | Effects of Vitamin B12 on the Body's Internal Clock NCT00120484 | Brigham and Women's Hospital | N/A |
| Completed | Evaluation of the Effects of Pharmaton Tablets on Mental Performance and Physical Fatigue in Nurses Working Ni NCT02199847 | Boehringer Ingelheim | Phase 2 |