| NCT Number | Conditions | Interventions | Sponsor/Collaborators | Phases | Start Date | Last Updated |
| NCT01003886 | Prostatic Hyperplasia | Drug: Doxazosin mesylate GITS | Pfizer | | 2009-05-01 | 2011-09-19 |
| NCT01062945 | Cocaine Addiction|Cocaine Abuse|Cocaine Dependence|Substance Abuse | Drug: Placebo|Drug: Doxazosin | Baylor College of Medicine|National Institute on Drug Abuse (NIDA) | Phase 1 | 2010-01-01 | 2012-07-25 |
| NCT01959022 | Stress Disorders, Post-Traumatic | Drug: Doxazosin XL | San Francisco Veterans Affairs Medical Center|United States Department of Defense|Northern California Institute of Research and Education | Phase 4 | 2013-10-01 | 2016-10-19 |
| NCT01145183 | Cocaine Dependence | Drug: Doxazosin|Drug: Placebo | Baylor College of Medicine|National Institute on Drug Abuse (NIDA) | Phase 2 | 2010-03-01 | 2017-02-04 |
| NCT02492334 | PTSD|Alcohol Use Disorder | Drug: Doxazosin|Drug: Placebo | Medical University of South Carolina|Ralph H. Johnson VA Medical Center | Phase 1|Phase 2 | 2016-07-01 | 2016-05-11 |
| NCT00880997 | Cocaine Dependence | Drug: Doxazosin|Drug: Placebo | Baylor College of Medicine|National Institute on Drug Abuse (NIDA) | Phase 1 | 2009-09-01 | 2012-10-22 |
| NCT01730846 | Smoking | Drug: Doxazosin|Drug: Placebo | Yale University|National Institute on Drug Abuse (NIDA) | Phase 2 | 2013-02-01 | 2016-11-22 |
| NCT02500602 | Posttraumatic Stress Disorder|Alcohol Use Disorders | Drug: doxazosin xL|Drug: placebo | VA Office of Research and Development|Medical University of South Carolina|Consortium to Alleviate PTSD | Phase 2 | 2016-06-01 | 2017-01-06 |
| NCT00922506 | Overactive Bladder|Benign Prostatic Hyperplasia | Drug: doxazosin plus tolterodine SR | Samsung Medical Center | Phase 4 | 2009-05-01 | 2015-02-12 |
| NCT00730418 | Benign Prostatic Hyperplasia | Drug: Doxazosin|Drug: Doxazosin | Samsung Medical Center | | 2007-01-01 | 2010-08-25 |
| NCT01386177 | Mood Disorder|Substance-Related Disorders|Amphetamine-Related Disorders | Drug: 3,4-Methylenedioxymethamphetamine|Drug: Doxazosin|Drug: placebo | University Hospital, Basel, Switzerland | Phase 1 | 2011-07-01 | 2016-01-20 |
| NCT01371851 | Methamphetamine or Cocaine Dependence | Drug: Doxazosin extended release | University of Arkansas|National Institute on Drug Abuse (NIDA)|Baylor College of Medicine | Phase 1|Phase 2 | 2011-06-01 | 2015-07-24 |
| NCT01437046 | Alcohol Dependence|Anxiety | Drug: Doxazosin|Drug: Placebo | Brown University|National Institute on Alcohol Abuse and Alcoholism (NIAAA) | Phase 2 | 2011-11-01 | 2015-07-20 |
| NCT02989493 | Alcoholism | Drug: Doxazosin|Other: Placebo | University of Wisconsin, Madison|National Institute on Alcohol Abuse and Alcoholism (NIAAA) | Phase 2 | 2017-01-01 | 2016-12-07 |
| NCT01379898 | Pheochromocytoma | Drug: Phenoxybenzamine|Drug: Doxazosin | University Medical Center Groningen|Radboud University|UMC Utrecht|VU University of Amsterdam|Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)|Leiden University Medical Center|Erasmus Medical Center|Maastricht University Medical Center|St. Antonius Hospital|Medisch Spectrum Twente|Maxima Medical Center|Canisius-Wilhelmina Hospital|Onze Lieve Vrouwe Gasthuis|Atrium Medical Center|Isala | Phase 4 | 2011-12-01 | 2016-10-25 |
| NCT00646841 | Hypertension | Drug: Doxazosin gastrointestinal therapeutic system (GITS) | Pfizer | Phase 4 | 2003-02-01 | 2008-08-07 |
| NCT01389609 | Hypertension | Drug: Doxazosin 4 mg Japanese marketed IR tablet|Drug: Doxazosin 4 mg ODT with water|Drug: Doxazosin 4 mg ODT without water | Pfizer | Phase 1 | 2011-07-01 | 2011-10-05 |
| NCT01953432 | Cocaine Dependence | Drug: Doxazosin|Drug: Placebo | VA Office of Research and Development|Baylor College of Medicine | Phase 2 | 2014-04-01 | 2016-09-13 |
| NCT02308202 | PTSD | Drug: doxazosin|Drug: Perindopril|Drug: Placebo | Baylor College of Medicine | Phase 1 | 2012-01-01 | 2016-09-27 |
| NCT02901977 | Hypertension | Drug: Ramipril|Drug: Doxazosin | Karolinska Institutet | Phase 4 | 2011-03-01 | 2016-09-10 |
| NCT01100021 | Erectile Dysfunction | Drug: Tamsulosin and avanafil|Drug: Doxazosin and avanafil | VIVUS, Inc. | Phase 1 | 2010-02-01 | 2011-01-05 |
| NCT02563405 | Hypertension | Drug: Doxazosin|Drug: Nifedipine | First Affiliated Hospital of Harbin Medical University | Phase 2|Phase 3 | 2015-09-01 | 2016-07-26 |
