The Effects of Orexin Antagonism on Fear Extinction in PTSD
Public ClinicalTrials.gov record NCT06788522. 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.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
PTSD affects approximately 22% of Veterans who have served in Iraq and Afghanistan. Symptoms of PTSD may include re-experiencing, avoidance of trauma reminders, negative thoughts or feelings, and hyperarousal, such as increased startle reactivity and disturbed sleep. Treatments for PTSD are based on fear extinction principles in which individuals are repeatedly exposed a feared cue in the absence of danger, resulting in diminishing physiological reactions, a process believed to underlie recovery from PTSD. Studies suggest that orexin, a wake-promoting neuropeptide, may enhance fear extinction. This study will examine whether suvorexant, a selective orexin-receptor antagonist, will enhance fear extinction in Veterans with PTSD and insomnia. Finding a role for orexins in fear extinction will support the rationale for its further evaluation in the treatment of PTSD. Suvorexant is an accessible, safe medication that has been well-established in treating insomnia. It has outstanding promise for treating common and distressing symptoms in Veterans with PTSD.
Study identification
- NCT ID
- NCT06788522
- Recruitment status
- Not yet recruiting
- Study type
- Interventional
- Phase
- Phase 4
- Enrollment
- 40,120 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
- May 31, 2026
- Primary completion
- Feb 29, 2032
- Completion
- Jun 29, 2032
- Last update posted
- Jun 1, 2026
2026 – 2032
United States locations
- U.S. sites
- 2
- U.S. states
- 2
- U.S. cities
- 2
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| San Francisco VA Medical Center, San Francisco, CA | San Francisco | California | 94121-1563 | — |
| Ralph H. Johnson VA Medical Center, Charleston, SC | Charleston | South Carolina | 29401-5703 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT06788522, 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 Jun 1, 2026 · Synced Sep 7, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT06788522 live on ClinicalTrials.gov.