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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 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 22, 2026, 9:44 AM 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 22, 2026, 9:44 AM EDT
Completed Phase 4 Interventional

Prazosin Alcohol Dependence IVR Study

NCT00167687
View directory record Official record
Conditions
Alcoholism
Interventions
prazosin
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Feb 14, 2008 · Synced Sep 22, 2026, 9:44 AM 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 22, 2026, 9:44 AM 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 22, 2026, 9:44 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 8, 2023 · Synced Sep 22, 2026, 9:44 AM EDT
Completed Phase 2 Interventional Results available

Testing Doxazosin to Treat Stress Mechanisms in Alcoholism

NCT02989493
View directory record Official record
Conditions
Alcoholism
Interventions
Doxazosin, Placebo
Drug · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 65 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 17, 2021 · Synced Sep 22, 2026, 9:44 AM 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 22, 2026, 9:44 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 3, 2012 · Synced Sep 22, 2026, 9:44 AM EDT
Completed Not applicable Interventional Results available

Neural Mechanisms of Change During the Treatment of Alcohol Use Disorders With Prazosin

NCT01916941
View directory record Official record
Conditions
Alcohol Use Disorder
Interventions
Prazosin, Placebo
Drug
Lead sponsor
University of New Mexico
Other
Eligibility
18 Years to 65 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Oct 16, 2017 · Synced Sep 22, 2026, 9:44 AM 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 22, 2026, 9:44 AM 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 22, 2026, 9:44 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 22, 2017 · Synced Sep 22, 2026, 9:44 AM 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 22, 2026, 9:44 AM EDT
Completed Not applicable Interventional Results available

Prazosin Treatment for Disruptive Agitation in Alzheimer's Disease

NCT01126099
View directory record Official record
Conditions
Alzheimer's Disease
Interventions
Prazosin, Placebo
Drug
Lead sponsor
Seattle Institute for Biomedical and Clinical Research
Other
Eligibility
Not listed
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 20, 2015 · Synced Sep 22, 2026, 9:44 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 1, 2021 · Synced Sep 22, 2026, 9:44 AM EDT
Active, not recruiting Phase 2 Interventional

Alpha-1 Blockade for Alcohol Use Disorder (AUD)

NCT04135846
View directory record Official record
Conditions
Alcohol Use Disorder (AUD)
Interventions
Doxazosin, Placebo
Drug
Lead sponsor
Brown University
Other
Eligibility
18 Years and older
Enrollment
184 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Sep 13, 2026 · Synced Sep 22, 2026, 9:44 AM 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 22, 2026, 9:44 AM 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 22, 2026, 9:44 AM EDT
Completed Phase 1 Interventional

The Effects of Doxazosin on the Cardiovascular and Subjective Effects of Cocaine

NCT01062945
View directory record Official record
Conditions
Cocaine Addiction, Cocaine Abuse, Cocaine Dependence, Substance Abuse
Interventions
Placebo, Doxazosin
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years to 55 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 26, 2012 · Synced Sep 22, 2026, 9:44 AM EDT
Completed Early Phase 1 Interventional

Doxazosin an a1 Antagonist for Alcohol Dependence

NCT01437046
View directory record Official record
Conditions
Alcohol Dependence, Anxiety
Interventions
Doxazosin, Placebo
Drug
Lead sponsor
Brown University
Other
Eligibility
18 Years to 65 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
2
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Aug 17, 2025 · Synced Sep 22, 2026, 9:44 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 Apr 30, 2018 · Synced Sep 22, 2026, 9:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Improving Community Ambulation After Hip Fracture

NCT01783704
View directory record Official record
Conditions
Hip Fracture
Interventions
Nutrition, PUSH, PULSE
Dietary Supplement · Behavioral
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
60 Years and older
Enrollment
210 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
4
States / cities
Farmington, Connecticut • Baltimore, Maryland • Lebanon, New Hampshire + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 26, 2022 · Synced Sep 22, 2026, 9:44 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 12, 2017 · Synced Sep 22, 2026, 9:44 AM EDT