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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: prazosin Clear all
Completed Phase 2 Interventional Results available

CAP: Doxazosin in the Treatment of Co-Occurring PTSD and Alcohol Use Disorders

NCT02500602
View directory record Official record
Conditions
Posttraumatic Stress Disorder, Alcohol Use Disorders
Interventions
doxazosin, placebo
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
Not listed
Enrollment
144 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated May 12, 2021 · Synced Sep 23, 2026, 6:50 PM EDT
Recruiting Phase 2 Interventional

Prazosin for Alcohol Use Disorder With Withdrawal Symptoms

NCT04793685
View directory record Official record
Conditions
Alcohol Withdrawal
Interventions
Prazosin, 12-Step Facilitation with Relapse Prevention and Contingency Management
Drug · Behavioral
Lead sponsor
Yale University
Other
Eligibility
18 Years to 70 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Dec 10, 2025 · Synced Sep 23, 2026, 6:50 PM EDT
Completed Phase 4 Interventional

Reducing Cannabis Overuse With Prazosin

NCT04721353
View directory record Official record
Conditions
Cannabis Dependence, Posttraumatic Stress Disorder, Cannabis Use Disorder
Interventions
Prazosin Hydrochloride
Drug
Lead sponsor
VA Puget Sound Health Care System
Federal
Eligibility
18 Years to 80 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 14, 2025 · Synced Sep 23, 2026, 6:50 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Prazosin and Naltrexone (PaN) Study for Veterans With Alcohol Use Disorders

NCT02322047
View directory record Official record
Conditions
Alcohol Use Disorder, Posttraumatic Stress Disorder (PTSD)
Interventions
Prazosin, Naltrexone, Placebo (Prazosin), Placebo (Naltrexone)
Drug
Lead sponsor
Seattle Institute for Biomedical and Clinical Research
Other
Eligibility
18 Years to 80 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Dec 28, 2020 · Synced Sep 23, 2026, 6:50 PM EDT
Completed No phase listed Observational

ACEI or ARB and COVID-19 Severity and Mortality in US Veterans

NCT04467931
View directory record Official record
Conditions
Hypertension, COVID
Interventions
ACEI/ARB, Non-ACEI/ARB, ACEI, ARB
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
22,213 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 27, 2021 · Synced Sep 23, 2026, 6:50 PM 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 17, 2023 · Synced Sep 23, 2026, 6:50 PM EDT
Completed Not applicable Interventional Results available

Orthostatic Hypotension Treatment on Rehab Unit

NCT01030874
View directory record Official record
Conditions
Orthostatic Hypotension, Falls
Interventions
Medication review, Nutrition/Salt intake, Education, Exercise, Drug Recommendations
Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 99 Years
Enrollment
356 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jun 30, 2021 · Synced Sep 23, 2026, 6:50 PM 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 25, 2024 · Synced Sep 23, 2026, 6:50 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Effectiveness of Prazosin on the Urinary Sodium Excretion Response to Mental Stress

NCT02431936
View directory record Official record
Conditions
Hypertension, Stress, Psychological, Blood Pressure
Interventions
Prazosin, Placebo
Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years to 50 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 19, 2019 · Synced Sep 23, 2026, 6:50 PM 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 3, 2012 · Synced Sep 23, 2026, 6:50 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

PUSH Plus Protein Pilot for Hip Fracture Patients

NCT03410823
View directory record Official record
Conditions
Hip Fracture
Interventions
PUSH, Protein, Nutrition
Behavioral · Dietary Supplement
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
60 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
2
States / cities
Baltimore, Maryland • Towson, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 25, 2024 · Synced Sep 23, 2026, 6:50 PM EDT
Completed Phase 4 Interventional Results available

Reducing Suicidal Ideation Through Treatment of Nightmares-Post Traumatic Stress Disorder (PTSD)

NCT02199652
View directory record Official record
Conditions
Post Traumatic Stress Disorder, Suicidal Ideation, Nightmares
Interventions
Prazosin, Placebo
Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 17, 2018 · Synced Sep 23, 2026, 6:50 PM 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 22, 2017 · Synced Sep 23, 2026, 6:50 PM 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 22, 2024 · Synced Sep 23, 2026, 6:50 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

DOX as a Potential Treatment for Methamphetamine Dependence

NCT02785393
View directory record Official record
Conditions
Substance-Related Disorders
Interventions
Sugar Pill, Doxazosin
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years to 55 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2016
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 28, 2016 · Synced Sep 23, 2026, 6:50 PM EDT
Completed Phase 1 Interventional

Complementary Combination Therapy for Cocaine Dependence

NCT02538744
View directory record Official record
Conditions
Cocaine Dependence
Interventions
Doxazosin, Modafinil, cocaine, Placebo
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years to 55 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 25, 2022 · Synced Sep 23, 2026, 6:50 PM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

The Acute Cardiovascular Effects of Nicotine in E-cigarettes (ACE) Study

NCT03010995
View directory record Official record
Conditions
Cigarette Smoking Toxicity, Nicotine, Acute Cardiovascular Disease
Interventions
Prazosin
Drug
Lead sponsor
University of Louisville
Other
Eligibility
18 Years to 40 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Jul 25, 2018 · Synced Sep 23, 2026, 6:50 PM EDT
Completed Not applicable Interventional Results available

Augmentation Trial of Prazosin for Post-Traumatic Stress Disorder (PTSD)

NCT00990106
View directory record Official record
Conditions
Stress Disorders, Post-Traumatic, Combat Disorders, Sleep Disorders
Interventions
prazosin hydrochloride, placebo
Drug
Lead sponsor
Seattle Institute for Biomedical and Clinical Research
Other
Eligibility
18 Years and older
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
2
States / cities
Seattle, Washington • Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated May 22, 2018 · Synced Sep 23, 2026, 6:50 PM EDT
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 Apr 30, 2024 · Synced Sep 23, 2026, 6:50 PM EDT
Completed Phase 4 Interventional Results available

Prazosin for Post-Concussive Headaches

NCT02965027
View directory record Official record
Conditions
Post-Traumatic Headache
Interventions
Prazosin, Placebo
Drug
Lead sponsor
Seattle Institute for Biomedical and Clinical Research
Other
Eligibility
18 Years and older
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2023
U.S. locations
2
States / cities
Seattle, Washington • Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Jul 9, 2024 · Synced Sep 23, 2026, 6:50 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Monoamine Antagonist Therapies for Methamphetamine Abuse Prazosin

NCT01178138
View directory record Official record
Conditions
Continuous Methamphetamine Abuse
Interventions
Prazosin
Drug
Lead sponsor
University of Arkansas
Other
Eligibility
18 Years to 50 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2013
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Dec 29, 2016 · Synced Sep 23, 2026, 6:50 PM 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 Apr 30, 2018 · Synced Sep 23, 2026, 6:50 PM 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 18, 2020 · Synced Sep 23, 2026, 6:50 PM 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 15, 2019 · Synced Sep 23, 2026, 6:50 PM EDT