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ClinicalTrials.gov public records Last synced Oct 21, 2026, 2:42 AM EDT

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Showing 1–24 of 39 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Prazosin medication Clear all
Terminated Phase 4 Interventional Results available

Two Stepped Care Models for Posttraumatic Stress Disorder (PTSD) Among Cambodian Refugees With PTSD

NCT01542372
View directory record Official record
Conditions
Posttraumatic Stress Disorder (PTSD)
Interventions
Medication augmentation, CBT
Drug · Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
43 Years and older
Enrollment
114 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 17, 2017 · Synced Oct 21, 2026, 2:42 AM EDT
Completed Not applicable Interventional Results available

Efficacy of Sleep Interventions for Posttraumatic Stress Disorder (PTSD)

NCT00393874
View directory record Official record
Conditions
Anxiety Disorders, Mood Disorders, Insomnia, Nightmares
Interventions
Behavioral Sleep Intervention, Prazosin, Placebo
Behavioral · Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 55 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 24, 2016 · Synced Oct 21, 2026, 2:42 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 Oct 21, 2026, 2:42 AM EDT
Terminated Not applicable Interventional Results available

Prazosin for Treating Noncombat Trauma Post-Traumatic Stress Disorder

NCT00183430
View directory record Official record
Conditions
Post-Traumatic Stress Disorder, Sleep Initiation and Maintenance Disorders
Interventions
Prazosin, Placebo, Psychotherapy
Drug · Behavioral
Lead sponsor
Seattle Institute for Biomedical and Clinical Research
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2010
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 14, 2018 · Synced Oct 21, 2026, 2:42 AM EDT
Completed Phase 1 Interventional

DOXAZOSIN FOR PTSD

NCT02308202
View directory record Official record
Conditions
PTSD
Interventions
doxazosin, Perindopril, Placebo
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years to 55 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 26, 2022 · Synced Oct 21, 2026, 2:42 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 Oct 21, 2026, 2:42 AM EDT
Completed Phase 2 Interventional Results available

Prazosin for Alcohol Dependence and Posttraumatic Stress Disorder

NCT01518972
View directory record Official record
Conditions
Alcohol Abuse, Posttraumatic Stress Disorder
Interventions
Prazosin, Placebo medication
Drug
Lead sponsor
Seattle Institute for Biomedical and Clinical Research
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 25, 2020 · Synced Oct 21, 2026, 2:42 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 29, 2016 · Synced Oct 21, 2026, 2:42 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 Oct 21, 2026, 2:42 AM EDT
Active, not recruiting Phase 3 Interventional

Predicting Responses to PTSD Treatment With Iris and Cardiovascular Tests

NCT03539614
View directory record Official record
Conditions
Posttraumatic Stress Disorder
Interventions
Prazosin, Placebo
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
21 Years to 75 Years
Enrollment
87 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 14, 2026 · Synced Oct 21, 2026, 2:42 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 18, 2025 · Synced Oct 21, 2026, 2:42 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 Oct 21, 2026, 2:42 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Pharmacogenetic Trial of Doxazosin for Treatment of Cocaine Abuse

NCT01953432
View directory record Official record
Conditions
Cocaine Dependence
Interventions
Doxazosin, Placebo
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 64 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 20, 2020 · Synced Oct 21, 2026, 2:42 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 Oct 21, 2026, 2:42 AM 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 May 1, 2024 · Synced Oct 21, 2026, 2:42 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 Oct 21, 2026, 2:42 AM EDT
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 13, 2021 · Synced Oct 21, 2026, 2:42 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 Jul 1, 2021 · Synced Oct 21, 2026, 2:42 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 27, 2012 · Synced Oct 21, 2026, 2:42 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 Oct 21, 2026, 2:42 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 15, 2008 · Synced Oct 21, 2026, 2:42 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 Oct 21, 2026, 2:42 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Chronic Postconcussive Headache: A Placebo-Controlled Treatment Trial of Prazosin

NCT02266329
View directory record Official record
Conditions
Posttraumatic Headache, Combat Disorders, Post Concussion Syndrome, Headache, Mild Traumatic Brain Injury, Posttraumatic Migraine
Interventions
prazosin hydrochloride, placebo
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2023
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Mar 30, 2026 · Synced Oct 21, 2026, 2:42 AM 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 28, 2021 · Synced Oct 21, 2026, 2:42 AM EDT