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Efficacy of Prazosin in Preventing Post-traumatic Stress Disorder

Preliminary Study About the Efficacy of an α1 Blocker (Prazosin) in Preventing the Occurrence of Post-traumatic Stress Disorder (PTSD) in Patients With Acute Stress

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03045016
Acronym
PRAZOSTRESS
Enrollment
15
Registered
2017-02-07
Start date
2017-04-21
Completion date
2020-03-30
Last updated
2026-05-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Acute Stress Disorder

Keywords

Acute stress Disorder, Post Traumatic Stress Disorder, Prevention, trauma, prazosin

Brief summary

After a traumatic event such as an accident or an assault, victims may experience intense stress symptoms that may evolve into "post-traumatic stress disorder" (PTSD). It is a frequent and serious pathology, which can be complicated by depression, addiction or suicide. Few means are available to prevent PTSD in people who have just undergone trauma. Prazosin is an antihypertensive drug that blocks α1 adrenaline receptors which could help to stop the vicious circle of stress and prevent the development of the disease. The objective of this study is to demonstrate the efficacy of prazosin to prevent PTSD in patients who visit an emergency department after trauma.

Interventions

DRUGPrazosin, ALPRESS® LP 2,5 et 5 mg

Patients will take Prazosin during 28 days ; there are two periods of treatment (escalation of doses): * PERIOD 1 (Day 0 - Day 7): 1 tablet of ALPRESS LP 2.5 mg (Prazosin) at bedtime for 7 days * PERIOD 2 (Day 8 - Day 27): 1 morning tablet of ALPRESS LP 5 mg (Prazosin) at bedtime for 21 days.

Sponsors

Hospices Civils de Lyon
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

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

Design outcomes

Primary

MeasureTime frameDescription
PTSD diagnosis6 monthsThe Presence of PTSD diagnosis will be assessed by the Clinician Administered PTSD Scale (CAPS)

Secondary

MeasureTime frameDescription
Acute stress symptoms14 daysThese symptoms are assessed by Diagnostic and Statistical Manual of Mental Disorders (DSM V) criteria
Prazosin side effects7 daysThis will be investigated using a self questionnaire about frequent side effects due to Prazosin, measurement of blood pressure, and orthostatic hypotension test
occurrence of complications of PTSD6 monthsComplications of PTSD are attempted suicide, suicidal ideation, addiction, depression and quality of life.
Compliance1 monthCompliance will be evaluated by counting the tablets consumed and not consumed at the end of the treatment by Prazosin

Countries

France

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 28, 2026