Evaluating the Effects of Tasimelteon vs. Placebo in Delayed Sleep-Wake Phase Disorder (DSWPD)
← catalyst calendarNCT04652882 · readout ≤ 41 d
Sponsored by Vanda Pharmaceuticals (industry) · VNDA — their whole pipeline →.
Phase
Phase 3
Status
Active, not recruiting
Study type
Interventional
Design
Randomized · Quadruple · Treatment
Enrollment
70estimated
Sites
17
Countries
Austria, Germany, United States
Every value on this page is a field the sponsor filed with ClinicalTrials.gov, reproduced. Dates are their own estimates, revised as a study runs, unless the registry marks them actual. sources →
Source: ClinicalTrials.gov, retrieved 2026-08-19
Dates
each axis at the precision it was filed, with the registry's own basis| Date | Filed | Basis | What it is |
|---|---|---|---|
| Start | 2020-12-09 | actual | When the study began enrolling |
| Primary completion | Sep 2026 | estimated | The date the last participant is measured for the primary outcome — the readout window |
| Study completion | Sep 2026 | estimated | The whole study's end, after follow-up |
| First posted | 2020-12-03 | actual | When this record first appeared on the registry |
| Results posted | — | When the sponsor posted results to the registry | |
| Record updated | 2026-07-27 | actual | The sponsor's own last edit to this record — every projection above is as current as this date |
What it studies
Conditions
- Sleep Wake Disorders
- Sleep Disorders, Circadian Rhythm
- Chronobiology Disorders
Interventions
- Drug: Tasimelteon
- Drug: Placebo
Primary outcome
what the primary-completion date above is the date OFChange in Sleep Onset over the treatment period, as measured by sleep diary.
measured 28 days
Publications
- PMID 38033548 — linked by the registry
Linked on the registry record. A “linked by the registry” entry is NLM's own automated PubMed match, not a claim by the sponsor that the paper reports this study.
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