Evaluating the Effects of Tasimelteon vs. Placebo in Delayed Sleep-Wake Phase Disorder (DSWPD)
Public ClinicalTrials.gov record NCT04652882. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Multicenter, Double-blind, Randomized Study to Evaluate the Effects of Tasimelteon vs. Placebo in Participants With Delayed Sleep-Wake Phase Disorder (DSWPD)
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This is a multicenter, double-blind, randomized study to evaluate the efficacy and safety of a daily single oral dose of tasimelteon and matching placebo in male and female participants with DSWPD.
Study identification
- NCT ID
- NCT04652882
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 3
- Enrollment
- 43 participants
Conditions and interventions
Eligibility (public fields only)
- Age range
- 18 Years to 75 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Dec 9, 2020 (Actual)
- Primary completion
- Sep 4, 2026 (Actual)
- Completion
- Sep 4, 2026 (Actual)
- Last update posted
- Oct 9, 2026
2020 – 2026
United States locations
- U.S. sites
- 11
- U.S. states
- 8
- U.S. cities
- 11
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Vanda Investigational Site | Los Angeles | California | 90025 | — |
| Vanda Investigational Site | Redwood City | California | 94063 | — |
| Vanda Investigational Site | Aurora | Colorado | 80045 | — |
| Vanda Investigational Site | Boston | Massachusetts | 02115 | — |
| Vanda Investigational Site | St Louis | Missouri | 63123 | — |
| Vanda Investigational Site | New Hyde Park | New York | 11042 | — |
| Vanda Investigational Site | Cincinnati | Ohio | 45212 | — |
| Vanda Investigational Site | Cleveland | Ohio | 44195 | — |
| Vanda Investigational Site | Columbia | South Carolina | 29201 | — |
| Vanda Investigational Site | San Antonio | Texas | 78229 | — |
| Vanda Investigational Site | Sherman | Texas | 75092 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 6 non-U.S. sites.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04652882, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Oct 9, 2026 · Synced Oct 20, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT04652882 live on ClinicalTrials.gov.