{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Doxazosin+placebo", "query": { "intervention": "Doxazosin placebo" }, "page_size": 10 }, "pagination": { "page": 1, "page_size": 10, "total_count": 17, "total_pages": 2, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Doxazosin+placebo&page=2&page_size=10", "previous_page_url": null }, "source": "remote", "last_synced_at": "2026-09-27T01:58:16.291Z", "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.", "notes": [ "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.", "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.", "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees." ], "trials": [ { "nct_id": "NCT02308202", "title": "DOXAZOSIN FOR PTSD", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "PTSD" ], "interventions": [ { "name": "doxazosin", "type": "DRUG" }, { "name": "Perindopril", "type": "DRUG" }, { "name": "Placebo", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Baylor College of Medicine", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "55 Years", "sex": "ALL", "summary": "18 Years to 55 Years" }, "enrollment_count": 30, "start_date": "2012-01", "completion_date": "2014-06-30", "has_results": false, "last_update_posted_date": "2022-04-26", "last_synced_at": "2026-09-27T01:58:16.291Z", "location_count": 1, "location_summary": "Houston, Texas", "locations": [ { "city": "Houston", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT02308202" }, { "nct_id": "NCT02989493", "title": "Testing Doxazosin to Treat Stress Mechanisms in Alcoholism", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Alcoholism" ], "interventions": [ { "name": "Doxazosin", "type": "DRUG" }, { "name": "Placebo", "type": "OTHER" } ], "intervention_types": [ "DRUG", "OTHER" ], "sponsor": "University of Wisconsin, Madison", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "65 Years", "sex": "ALL", "summary": "18 Years to 65 Years" }, "enrollment_count": 61, "start_date": "2017-04-12", "completion_date": "2020-03-13", "has_results": true, "last_update_posted_date": "2021-03-18", "last_synced_at": "2026-09-27T01:58:16.291Z", "location_count": 1, "location_summary": "Madison, Wisconsin", "locations": [ { "city": "Madison", "state": "Wisconsin" } ], "official_url": "https://clinicaltrials.gov/study/NCT02989493" }, { "nct_id": "NCT01371851", "title": "Doxazosin for Psychostimulant Dependence", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1", "PHASE2" ], "conditions": [ "Methamphetamine or Cocaine Dependence" ], "interventions": [ { "name": "Doxazosin extended release", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "University of Arkansas", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "55 Years", "sex": "ALL", "summary": "18 Years to 55 Years" }, "enrollment_count": 22, "start_date": "2011-06", "completion_date": "2014-05", "has_results": true, "last_update_posted_date": "2015-07-27", "last_synced_at": "2026-09-27T01:58:16.291Z", "location_count": 1, "location_summary": "Little Rock, Arkansas", "locations": [ { "city": "Little Rock", "state": "Arkansas" } ], "official_url": "https://clinicaltrials.gov/study/NCT01371851" }, { "nct_id": "NCT01100021", "title": "Hemodynamic Study of Avanafil and Two α-Adrenergic Blockers,Doxazosin and Tamsulosin", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Erectile Dysfunction" ], "interventions": [ { "name": "Tamsulosin and avanafil", "type": "DRUG" }, { "name": "Doxazosin and avanafil", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "VIVUS LLC", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "40 Years", "maximum_age": "65 Years", "sex": "MALE", "summary": "40 Years to 65 Years · Male only" }, "enrollment_count": 48, "start_date": "2010-02", "completion_date": "2010-04", "has_results": false, "last_update_posted_date": "2011-01-07", "last_synced_at": "2026-09-27T01:58:16.291Z", "location_count": 1, "location_summary": "Tempe, Arizona", "locations": [ { "city": "Tempe", "state": "Arizona" } ], "official_url": "https://clinicaltrials.gov/study/NCT01100021" }, { "nct_id": "NCT00880997", "title": "The Efficacy of Doxazosin for Cocaine Users", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Cocaine Dependence" ], "interventions": [ { "name": "Doxazosin", "type": "DRUG" }, { "name": "Placebo", "type": "OTHER" } ], "intervention_types": [ "DRUG", "OTHER" ], "sponsor": "Baylor College of Medicine", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "64 Years", "sex": "ALL", "summary": "18 Years to 64 Years" }, "enrollment_count": 35, "start_date": "2009-09", "completion_date": "2011-12", "has_results": true, "last_update_posted_date": "2019-08-22", "last_synced_at": "2026-09-27T01:58:16.291Z", "location_count": 1, "location_summary": "Houston, Texas", "locations": [ { "city": "Houston", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT00880997" }, { "nct_id": "NCT01062945", "title": "The Effects of Doxazosin on the Cardiovascular and Subjective Effects of Cocaine", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Cocaine Addiction", "Cocaine Abuse", "Cocaine Dependence", "Substance Abuse" ], "interventions": [ { "name": "Placebo", "type": "DRUG" }, { "name": "Doxazosin", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Baylor College of Medicine", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "55 Years", "sex": "ALL", "summary": "18 Years to 55 Years" }, "enrollment_count": 13, "start_date": "2010-01", "completion_date": "2011-01", "has_results": false, "last_update_posted_date": "2012-07-27", "last_synced_at": "2026-09-27T01:58:16.291Z", "location_count": 1, "location_summary": "Houston, Texas", "locations": [ { "city": "Houston", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT01062945" }, { "nct_id": "NCT03339258", "title": "A Randomized Controlled Trial of Doxazosin for Nightmares, Sleep Disturbance, and Non-Nightmare Clinical Symptoms in PTSD", "overall_status": "UNKNOWN", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Stress Disorders, Post-Traumatic" ], "interventions": [ { "name": "Doxazosin Mesylate, Extended Release", "type": "DRUG" }, { "name": "Placebo", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "San Francisco Veterans Affairs Medical Center", "sponsor_class": "FED", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "75 Years", "sex": "ALL", "summary": "18 Years to 75 Years" }, "enrollment_count": 80, "start_date": "2018-04-15", "completion_date": "2024-06", "has_results": false, "last_update_posted_date": "2024-05-01", "last_synced_at": "2026-09-27T01:58:16.291Z", "location_count": 1, "location_summary": "San Francisco, California", "locations": [ { "city": "San Francisco", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT03339258" }, { "nct_id": "NCT00021814", "title": "Medical Therapy of Prostatic Symptoms", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Prostatic Hyperplasia", "Prostatic Hypertrophy, Benign" ], "interventions": [ { "name": "Doxazosin", "type": "DRUG" }, { "name": "Finasteride", "type": "DRUG" }, { "name": "Doxazosin placebo", "type": "DRUG" }, { "name": "Finasteride placebo", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)", "sponsor_class": "NIH", "healthy_volunteers": true, "eligibility": { "minimum_age": "50 Years", "maximum_age": null, "sex": "MALE", "summary": "50 Years and older · Male only" }, "enrollment_count": 3407, "start_date": "1995-12", "completion_date": "2001-11-30", "has_results": false, "last_update_posted_date": "2018-09-28", "last_synced_at": "2026-09-27T01:58:16.291Z", "location_count": 17, "location_summary": "La Jolla, California • Aurora, Colorado • New Haven, Connecticut + 13 more", "locations": [ { "city": "La Jolla", "state": "California" }, { "city": "Aurora", "state": "Colorado" }, { "city": "New Haven", "state": "Connecticut" }, { "city": "Washington D.C.", "state": "District of Columbia" }, { "city": "Atlanta", "state": "Georgia" } ], "official_url": "https://clinicaltrials.gov/study/NCT00021814" }, { "nct_id": "NCT01953432", "title": "Pharmacogenetic Trial of Doxazosin for Treatment of Cocaine Abuse", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Cocaine Dependence" ], "interventions": [ { "name": "Doxazosin", "type": "DRUG" }, { "name": "Placebo", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "VA Office of Research and Development", "sponsor_class": "FED", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "64 Years", "sex": "ALL", "summary": "18 Years to 64 Years" }, "enrollment_count": 43, "start_date": "2014-04-01", "completion_date": "2017-10-01", "has_results": true, "last_update_posted_date": "2020-02-20", "last_synced_at": "2026-09-27T01:58:16.291Z", "location_count": 1, "location_summary": "Houston, Texas", "locations": [ { "city": "Houston", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT01953432" }, { "nct_id": "NCT00645034", "title": "A Study to Investigate the Effects on Blood Pressure and Pulse Rate of a Single 100mg Dose of Sildenafil in Patients With Benign Prostatic Hyperplasia Who Are Being Treated With Doxazosin", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Benign Prostatic Hyperplasia" ], "interventions": [ { "name": "placebo", "type": "DRUG" }, { "name": "sildenafil", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Pfizer's Upjohn has merged with Mylan to form Viatris Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "35 Years", "maximum_age": "75 Years", "sex": "MALE", "summary": "35 Years to 75 Years · Male only" }, "enrollment_count": 20, "start_date": "2002-11", "completion_date": "2003-07", "has_results": false, "last_update_posted_date": "2021-02-01", "last_synced_at": "2026-09-27T01:58:16.291Z", "location_count": 2, "location_summary": "Laguna Woods, California • Newport Beach, California", "locations": [ { "city": "Laguna Woods", "state": "California" }, { "city": "Newport Beach", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT00645034" } ] }