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ClinicalTrials.gov public records Last synced Sep 30, 2026, 8:36 AM EDT

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Showing 25–48 of 71 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: prazosin hydrochloride Clear all
Not listed Phase 2 Interventional

A Randomized Controlled Trial of Doxazosin for Nightmares, Sleep Disturbance, and Non-Nightmare Clinical Symptoms in PTSD

NCT03339258
View directory record Official record
Conditions
Stress Disorders, Post-Traumatic
Interventions
Doxazosin Mesylate, Extended Release, Placebo
Drug
Lead sponsor
San Francisco Veterans Affairs Medical Center
Federal
Eligibility
18 Years to 75 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated May 1, 2024 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Phase 2 Interventional Results available

Prazosin for Agitation in Alzheimer's Disease

NCT03710642
View directory record Official record
Conditions
Alzheimer's Disease, Disruptive Behavior
Interventions
Prazosin, Placebo oral capsule
Drug
Lead sponsor
Alzheimer's Disease Cooperative Study (ADCS)
Other
Eligibility
Not listed
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
14
States / cities
Sun City, Arizona • Los Angeles, California • San Diego, California + 10 more
Source: ClinicalTrials.gov public record
Updated Feb 6, 2023 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Phase 4 Interventional Results available

Black Education and Treatment of Hypertension (BEAT HTN)

NCT00661895
View directory record Official record
Conditions
Hypertension
Interventions
Hydrochlorothiazide, Lisinopril, Lisinopril and Hydrochlorothiazide, Nifedipine XL, Metoprolol tartrate, Atenolol, Valsartan, Doxazosin, Clonidine, Hydralazine, Metoprolol succinate, Amlodipine
Drug
Lead sponsor
Creighton University
Other
Eligibility
25 Years to 80 Years
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Dec 4, 2012 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Not applicable Interventional Results available

Prazosin Augmentation of Outpatient Treatment of Alcohol Use Disorders in Active Duty Soldiers With and Without PTSD

NCT02226367
View directory record Official record
Conditions
Alcohol Use Disorders, Stress Disorders, Posttraumatic, Combat Disorders
Interventions
prazosin hydrochloride, placebo
Drug
Lead sponsor
Seattle Institute for Biomedical and Clinical Research
Other
Eligibility
21 Years and older
Enrollment
158 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Feb 3, 2023 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Phase 1 Interventional

Treatment of Supine Hypertension in Autonomic Failure

NCT00223717
View directory record Official record
Conditions
Hypertension
Interventions
Clonidine, Nitroglycerin transdermal, Dipyridamole/ Aspirin (Aggrenox), Desmopressin (DDAVP), Sildenafil, Nifedipine, Hydralazine, Hydrochlorothiazide, Placebo, Bosentan, Diltiazem, Eplerenone, guanfacine, L-arginine, captopril, carbidopa, losartan, metoprolol tartrate, nebivolol hydrochloride, prazosin hydrochloride, tamsulosin hydrochloride, Head-up tilt., aliskiren, Local heat stress
Drug · Dietary Supplement · Other
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 80 Years
Enrollment
152 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2017
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 13, 2017 · Synced Sep 30, 2026, 8:36 AM EDT
Withdrawn Not applicable Interventional

Effect of Prazosin on Neurophysiology and Cognition in Post-Traumatic Stress Disorder (PTSD)

NCT00890643
View directory record Official record
Conditions
Posttraumatic Stress Disorder
Interventions
prazosin hydrochloride, placebo
Drug
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 23, 2013 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Repurposing alpha1 Noradrenergic Antagonists for Alcoholism Treatment

NCT02966340
View directory record Official record
Conditions
Alcoholism
Interventions
Prazosin, Placebo
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 50 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 28, 2019 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Phase 3 Interventional Results available

Prazosin for Treatment of Patients With Alcohol Dependence (AD) and Post Traumatic Stress Disorder (PTSD).

NCT00744055
View directory record Official record
Conditions
Alcohol Dependence, Stress Disorders, Post-Traumatic
Interventions
Prazosin, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
21 Years to 65 Years
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 19, 2020 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Not applicable Interventional Results available

Effectiveness of Prazosin in Bulimic Patients Experiencing Nightmares Due to PTSD

NCT02382848
View directory record Official record
Conditions
Stress Disorders, Post-Traumatic, Bulimia Nervosa
Interventions
Prazosin, Placebo
Drug
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 16, 2019 · Synced Sep 30, 2026, 8:36 AM EDT
Withdrawn Phase 4 Interventional

Administration of Prazosin to Prevent PTSD in Adult Women After Sexual Assault

NCT03997864
View directory record Official record
Conditions
Posttraumatic Stress Disorder
Interventions
Prazosin, Placebos
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 50 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 23, 2025 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Optimal Duration of Indwelling Urinary Catheter Following Pelvic Surgery

NCT01923129
View directory record Official record
Conditions
Urinary Retention
Interventions
Prazosin given 6 hours prior to catheter removal in the 24 hour group
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older
Enrollment
142 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2017
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 20, 2019 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Hemodynamic Study of Avanafil and Two α-Adrenergic Blockers,Doxazosin and Tamsulosin

NCT01100021
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
Tamsulosin and avanafil, Doxazosin and avanafil
Drug
Lead sponsor
VIVUS LLC
Industry
Eligibility
40 Years to 65 Years · Male only
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Jan 7, 2011 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Does Doxazosin Attenuate Stress-induced Smoking and Improve Clinical Outcomes?

NCT01730846
View directory record Official record
Conditions
Smoking
Interventions
Doxazosin 4mg/day, Placebo, Doxazosin 8mg/day
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 60 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 20, 2018 · Synced Sep 30, 2026, 8:36 AM EDT
Terminated Not applicable Interventional Results available

Prazosin for ETOH or Cocaine Craving

NCT00240227
View directory record Official record
Conditions
Alcoholism, Cocaine Dependence
Interventions
Prazosin, placebo
Drug
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 70 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2009
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 31, 2018 · Synced Sep 30, 2026, 8:36 AM EDT
Terminated Phase 4 Interventional Results available

Prazosin and Cerebrospinal Fluid (CSF) Biomarkers in Mild Traumatic Brain Injury (mTBI)

NCT03221751
View directory record Official record
Conditions
Dementia
Interventions
prazosin hydrochloride, placebo
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
21 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2023
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Feb 26, 2024 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Early Phase 1 Interventional

Quetiapine Augmentation of PE Therapy for the Treatment of Co-occurring PTSD and Mild Traumatic Brain Injury

NCT04280965
View directory record Official record
Conditions
Post Traumatic Stress Disorder
Interventions
Quetiapine Fumarate, Standard of care meducations
Drug · Other
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated May 9, 2023 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Phase 2 Interventional Results available

Pharmacogenetics of Doxazosin for Cocaine Dependence

NCT01145183
View directory record Official record
Conditions
Cocaine Dependence
Interventions
Doxazosin, Placebo
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years to 64 Years
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 22, 2019 · Synced Sep 30, 2026, 8:36 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Brain Blood Vessel Responses to Changes in Blood Flow: Younger Cohort

NCT06629090
View directory record Official record
Conditions
Magnetic Resonance Imaging, Cerebrovascular Circulation
Interventions
MRI, Prazosin, Placebo
Device · Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
20 Years to 40 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Not applicable Interventional Results available

A Policy Relevant US Trauma Care System Pragmatic Trial for PTSD and Comorbidity

NCT02655354
View directory record Official record
Conditions
Posttraumatic Stress Disorder, Depression, Alcohol-Related Disorders, Suicidal Ideation, Substance-Related Disorders, Mild Cognitive Impairment, Quality of Life, Pain, Wounds and Injury, Brain Injuries, Chronic Disease
Interventions
Motivational Interviewing, Cognitive Behavioral Therapy Elements, Care Management, Fluoxetine, Fluvoxamine, Paroxetine, Sertraline, Citalopram, Venlafaxine, Duloxetine, Mirtazapine, Diphenhydramine, Trazodone, Prazosin
Behavioral · Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
635 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
24
States / cities
Scottsdale, Arizona • Beverly Hills, California • Sacramento, California + 20 more
Source: ClinicalTrials.gov public record
Updated Jul 2, 2021 · Synced Sep 30, 2026, 8:36 AM EDT
Terminated Phase 1 Interventional

A Trial to Assess the Effects of Prazosin or Propranolol on Blood Pressure in the Presence of Brexpiprazole/Sertraline

NCT05189977
View directory record Official record
Conditions
Post-traumatic Stress Disorder (PTSD)
Interventions
Propranolol, Prazosin
Drug
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Princeton, New Jersey
Source: ClinicalTrials.gov public record
Updated Jan 23, 2024 · Synced Sep 30, 2026, 8:36 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Brain Blood Vessel Responses to Changes in Blood Flow

NCT06629077
View directory record Official record
Conditions
Magnetic Resonance Imaging, Cerebrovascular Circulation
Interventions
MRI, Prazosin, Placebo
Device · Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
55 Years to 69 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 15, 2026 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Neurobiology of Sleep and Sleep Treatment Response in Returning Veterans

NCT01637584
View directory record Official record
Conditions
Non PTSD, PTSD
Interventions
Prazosin, Placebo
Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 50 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 23, 2017 · Synced Sep 30, 2026, 8:36 AM EDT
Completed No phase listed Observational

Mechanisms of Increased Ambulatory Blood Pressure in Patients With Intradialytic Hypertension

NCT01862497
View directory record Official record
Conditions
Intradialytic Hypertension
Interventions
Carvedilol vs. Prazosin
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated May 1, 2018 · Synced Sep 30, 2026, 8:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Multimodal Neuroimaging of Stress and Reward Cues to Assess Alcoholism Risk and Relapse

NCT02616094
View directory record Official record
Conditions
Alcohol Dependence
Interventions
Multi-method Neuroendocrine and Neuroimaging Procedure Scan 1, Multi-method Neuroendocrine and Neuroimaging Procedure Scan 2
Device
Lead sponsor
Yale University
Other
Eligibility
18 Years to 60 Years
Enrollment
224 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2022
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 18, 2023 · Synced Sep 30, 2026, 8:36 AM EDT