Blood pressure drug prazosin tested against diabetes risk in PTSD
NCT ID NCT07862712
First seen Oct 07, 2026 · Last updated Oct 16, 2026 · Updated 3 times
Summary
Researchers are studying how PTSD and insulin resistance, a precursor to diabetes, might be connected in Veterans. The trial gives all participants prazosin, a medication used for high blood pressure and some PTSD symptoms, for 12 weeks. The team measures changes in insulin sensitivity and looks at whether depression symptoms shift along with it. The goal is to see if targeting the body's stress signaling can improve how the body handles sugar.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- prazosin, a blood pressure medication also known as Minipress
- What this could lead to
- If prazosin helps, it could point to a specific biological pathway linking PTSD to diabetes risk, guiding future treatments to prevent insulin resistance in Veterans.
- What could go wrong
- This is a small Phase 4 study of 70 Veterans, so results may not apply to everyone. Prazosin can cause dizziness and low blood pressure, and it may not improve insulin sensitivity at all.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 4
Runs after approval, following long-term safety and how well the treatment works in everyday use.
- Participants
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About 70 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Mar 2027
An estimate. Start dates often move.
- Expected to finish
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Dec 2032
An estimate. End dates often move.
- Lead sponsor
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A government agency
The lead sponsor is a US federal agency other than the NIH.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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21 to 75 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Veteran of the US military 2. Diagnosis of post-traumatic stress disorder (PTSD) defined by Diagnostic and Statistical Manual of Mental Disorders (DSM-5) symptom count on Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) Exclusion Criteria: 1. Any form of diabetes as defined by the American Diabetes Association. Exceptions may be made for participants with previously undiagnosed, early, asymptomatic Type 2 Diabetes Mellitus (T2DM) who meet American Diabetes Association criteria for diabetes during study screening who wish to be included 2. Diagnosis of DSM-5-defined bipolar I, schizophrenia spectrum or other psychotic disorders (by MINI) 3. Diagnosis of dementia or related progressive neurocognitive disorder, based on clinical records 4. Diagnosis of moderate or severe substance use disorder (except for caffeine and nicotine) during the preceding 3 months 5. Current use or use within the past 2 weeks of a medication with significant 1-AR or 2-AR activity (prazosin, doxazosin, alfuzosin, clonidine, guanfacine), or opiates 6. Current use or use within the past 3 months of antipsychotics, glucocorticoid medications, or glucose-lowering medications, including but not limited to metformin and GLP-1 agonists 7. Contraindication to prazosin 8. History of moderate or severe Traumatic Brain Injury (TBI) as defined by the Ohio State University TBI Identification Method 9. Increased risk of suicide that necessitates inpatient treatment, intensive outpatient care, or treatment excluded by the protocol 10. Pregnancy or lactation, or anticipated pregnancy at any point during study participation 11. Ongoing or initiation of new treatment with evidence-based trauma-focused therapy for post-traumatic stress disorder (PTSD) within 2 weeks of baseline. Supportive psychotherapy may be continued during the study. 12. Current enrollment in another interventional trial for post-traumatic stress disorder (PTSD)
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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VA Puget Sound Health Care System Seattle Division, Seattle, WA
Seattle, Washington, 98108-1532, United States
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