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Sleep Disorders, Circadian Rhythm
Open-data reference.
5 US clinical trials · 1 currently recruiting
Active & Recent Trials
Evaluating the Effects of Tasimelteon vs. Placebo in Delayed Sleep-Wake Phase Disorder (DSWPD)
Vanda Pharmaceuticals
NCT04652882
Efficacy of Ramelteon on Speeding Up Sleep in Subjects With Delayed Sleep Phase Syndrome
Takeda
NCT00593736
Treatment Strategies for Children With Smith-Magenis Syndrome
National Human Genome Research Institute (NHGRI)
NCT00506259
Implementing and Sustaining a Transdiagnostic Sleep and Circadian Treatment
University of California, Berkeley
NCT03556878
Effects of Vitamin B12 on the Body's Internal Clock
Brigham and Women's Hospital
NCT00120484
Phase Distribution
| Phase | Trial count |
|---|---|
| Early Phase 1 | 1 |
| Phase 2 | 1 |
| Phase 3 | 1 |
Top Sponsors
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Reading the Sleep Disorders, Circadian Rhythm Trial Landscape
ClinicalTrials.gov lists 5 US studies indexed under Sleep Disorders, Circadian Rhythm, and 1 of those are currently open to recruitment — roughly 20% of the total volume on the registry. That ratio is a useful proxy for activity level: a high share of recruiting studies often signals that research interest is current and that new enrollment opportunities are appearing, while a low share typically means the field is dominated by completed or follow-up work where most participant spots have already been filled. These counts reflect the public registry only and include studies at every stage of design, so they should be read as an index of research attention rather than as a measure of treatment availability.
The phase distribution for Sleep Disorders, Circadian Rhythm shows 1 late-stage studies (Phase 3 and Phase 4 combined) alongside 2 earlier-phase entries (Phase 1 through Phase 2). Phase 1 and Phase 2 studies focus on early safety signals, dosing, and preliminary effect, while Phase 3 studies are typically the larger efficacy and safety trials submitted toward regulatory review, and Phase 4 studies follow approved interventions in real-world use. A condition weighted toward later phases often reflects a mature research pipeline with several interventions already close to or past approval, whereas a heavier early-phase tilt suggests the field is still exploring new mechanisms and candidate approaches.
Top sponsor activity for Sleep Disorders, Circadian Rhythm is led by Vanda Pharmaceuticals with 1 indexed trial, alongside 4 other organizations in the top contributor list. The list on this page surfaces up to 5 of the most relevant recent and active entries, ordered with recruiting studies first so practical options are visible. All figures are derived from the public ClinicalTrials.gov dataset maintained by the National Library of Medicine and are reproduced here for reference. Inclusion of a trial, sponsor, or intervention on this page is neither an endorsement nor a recommendation — eligibility, protocol changes, and site-level status can shift frequently, so always verify current details on ClinicalTrials.gov and consult a qualified healthcare provider before acting on anything you see here.
Frequently Asked Questions
How many clinical trials are there for Sleep Disorders, Circadian Rhythm?
PlainTrial tracks 5 US clinical trials for Sleep Disorders, Circadian Rhythm, of which 1 are currently recruiting participants. Data sourced from ClinicalTrials.gov.
How do I find a recruiting trial for Sleep Disorders, Circadian Rhythm?
Use the trial list above filtered by "Recruiting" status, or visit our trial finder at /recruiting to search by condition and state. Always discuss trial participation with your healthcare provider before enrolling.
Is this data current?
Data is sourced from ClinicalTrials.gov and reflects our most recent data pull. Trial status may have changed since then. Always verify current information at ClinicalTrials.gov before making decisions about participation.
Related
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from ClinicalTrials.gov (National Library of Medicine). Consult a qualified professional before making decisions based on this data.
Read our methodology — how this data is sourced, computed, and verified.
Source: ClinicalTrials.gov (NIH/NLM) ClinicalTrials.gov AACT registry · 2024 Trial counts and statuses sourced from ClinicalTrials.gov. Sponsor counts include both industry and federal/academic sponsors.