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Could a common blood pressure pill stop PTSD before it starts?

NCT ID NCT03045016

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether prazosin, a drug normally used for high blood pressure, could prevent post-traumatic stress disorder (PTSD) in people who recently experienced a traumatic event like an accident or assault. Researchers gave the drug to 15 adults who showed signs of acute stress disorder within a week of the trauma. The goal was to see if blocking certain stress-related brain signals could stop PTSD from developing.

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

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

15 people

The number who actually took part.

Started

Apr 2017

Finished

Mar 2020

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Patient of age \>18 years and \<65 years * Victim of direct experience trauma (accident or physical aggression) * Presence of an ASD between D3 and D7 after the trauma according to DSM V criteria Exclusion Criteria: * Contra-indication to prazosin: orthostatic hypotension, right heart failure, other hypotensive therapy, 5-phosphodiesterase inhibitors (sildenafil) or diuretic, history of syncope or severe unexplained faintness, hypersensitivity known to quinazolines. * Alcohol and / or drug use at the time of the trauma * History of psychotic disorder * Suicidal risk defined by a score ≥ 2 on the Suicidal Ideas Item of the Beck Depression Inventory (BDI) * Protected or vulnerable Major * Persistence of a life threatening injury at D3 * Sexual assault * Only moderate head trauma can be included and therefore excluded patients with loss of consciousness greater than 30 minutes, Glasgow score less than 13, post-traumatic amnesia greater than 24 hours (Ruff et al., 2009) . * Prescription of morphine or morphine derivative in progress * Pregnancy or breastfeeding period * Lack of effective contraception in a woman susceptible to childbearing * Known hepatic dysfunction * Narcolepsy (Gelineau's disease) * Cardiac or vascular history including coronary artery disease * Strict low-sodium diet

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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.

Contacts and locations

Locations

  • Groupement Hospitalier Edouard Herriot - Emergency Psychiatry Department

    Lyon, 69003, France

More trials for these conditions

Other studies related to the condition(s) this trial covers.