Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.

Clear filters
ClinicalTrials.gov public records Last synced Sep 24, 2026, 4:03 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Intervention: PDE5 Inhibitors Clear all
Completed No phase listed Observational Results available

Data Analysis for Drug Repurposing for Effective Alzheimer's Medicines (DREAM) - PDE5

NCT05039086
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
PDE5 inhibitor, Endothelin Receptor Antagonists
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
65 Years and older
Enrollment
13,021 participants
Timeline
2021 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 5, 2025 · Synced Sep 24, 2026, 4:03 PM EDT
Terminated Phase 4 Interventional Results available

PDE5 Inhibitor Use and Non-arteritic Anterior Ischemic Optic Neuropathy (NAION)

NCT00867815
View directory record Official record
Conditions
Anterior Ischemic Optic Neuropathy
Interventions
Diagnostic procedures
Drug
Lead sponsor
Bayer
Industry
Eligibility
40 Years and older · Male only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2018
U.S. locations
11
States / cities
Vista, California • Atlantis, Florida • Fort Myers, Florida + 7 more
Source: ClinicalTrials.gov public record
Updated Jan 22, 2019 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 2 Interventional

Efficacy and Safety Evaluating Fispemifene in the Treatment of Hypogonadal Men With Erectile Dysfunction Unresponsive to PDE5 Inhibitors

NCT00415571
View directory record Official record
Conditions
Hypogonadism, Erectile Dysfunction
Interventions
Fispemifene (once daily for 8 weeks)
Drug
Lead sponsor
QuatRx Pharmaceuticals Company
Industry
Eligibility
20 Years and older · Male only
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
14
States / cities
Birmingham, Alabama • Tucson, Arizona • Hot Springs, Arkansas + 11 more
Source: ClinicalTrials.gov public record
Updated Feb 2, 2010 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 2 Interventional Results available

PF-00489791 For The Treatment Of Raynaud's

NCT01090492
View directory record Official record
Conditions
Raynaud's Disease, Peripheral Vascular Disease
Interventions
PF-00489791
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 65 Years
Enrollment
243 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
23
States / cities
Redwood City, California • Farmington, Connecticut • Washington D.C., District of Columbia + 19 more
Source: ClinicalTrials.gov public record
Updated May 15, 2018 · Synced Sep 24, 2026, 4:03 PM EDT
Not listed Phase 3 Interventional

Sildenafil in US Heart Failure Patients (SilHF-US)

NCT03460470
View directory record Official record
Conditions
Heart Failure, Pulmonary Hypertension
Interventions
Sildenafil, Placebo oral capsule
Drug
Lead sponsor
Hartford Hospital
Other
Eligibility
18 Years to 80 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Hartford, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 8, 2018 · Synced Sep 24, 2026, 4:03 PM EDT
Terminated Phase 2 Interventional Results available

Administration of Tadalafil in Conjunction With Lenalidomide and Dexamethasone in Patients With Multiple Myeloma

NCT01374217
View directory record Official record
Conditions
Multiple Myeloma
Interventions
Tadalafil, Lenalidomide, Dexamethasone, Clarithromycin
Drug
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 9, 2018 · Synced Sep 24, 2026, 4:03 PM EDT
Active, not recruiting Phase 3 Interventional Results available

A Study of Selexipag as Add-On Treatment to Standard of Care in Children With Pulmonary Arterial Hypertension

NCT04175600
View directory record Official record
Conditions
Hypertension, Pulmonary
Interventions
Selexipag, Placebo, Standard of Care (SOC): Endothelin receptor antagonist, SOC: Phosphodiesterase type 5 (PDE-5) inhibitor, SOC: Soluble guanylate cyclase stimulator
Drug
Lead sponsor
Actelion
Industry
Eligibility
2 Years to 17 Years
Enrollment
138 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
13
States / cities
Phoenix, Arizona • Los Angeles, California • San Francisco, California + 10 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 24, 2026, 4:03 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Stress Management Using an App to Improve Response With PDE5 Inhibitors in Men With Erectile Dysfunction.

NCT02757807
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
Utilization of Serenita for Relaxation
Behavioral
Lead sponsor
Eco Fusion
Industry
Eligibility
18 Years to 55 Years · Male only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 19, 2016 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 3 Interventional Results available

FREEDOM-C: Oral Treprostinil in Combination With an Endothelin Receptor Antagonist (ERA) and/or a Phosphodiesterase-5 (PDE-5) Inhibitor for the Treatment of Pulmonary Arterial Hypertension (PAH)

NCT00325442
View directory record Official record
Conditions
Pulmonary Hypertension
Interventions
Oral treprostinil (UT-15C) sustained release tablets, Placebo
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
12 Years to 70 Years
Enrollment
354 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
39
States / cities
Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 31 more
Source: ClinicalTrials.gov public record
Updated Aug 1, 2017 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 4 Interventional Results available

Research Evaluating a PDE5 Inhibitor for Erectile Dysfunction

NCT01698684
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
Placebo, Avanafil 100 mg, Avanafil 200 mg
Drug
Lead sponsor
VIVUS LLC
Industry
Eligibility
18 Years and older · Male only
Enrollment
440 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
3
States / cities
Jupiter, Florida • Raleigh, North Carolina • Wilmington, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 26, 2014 · Synced Sep 24, 2026, 4:03 PM EDT
Recruiting Early Phase 1 Interventional

Sildenafil to Reduce Vascular Remodeling During Left Ventricular Assist Device Support

NCT06510322
View directory record Official record
Conditions
Vascular Diseases
Interventions
Sildenafil, Placebo
Drug · Other
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jan 22, 2026 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 3 Interventional Results available

A Study for Patients With Erectile Dysfunction to Test Whether Tadalafil Taken Once a Day Can Better Improve Psychological Outcomes.

NCT00734604
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
tadalafil once a day [T(OaD)], sildenafil citrate as needed [S(PRN)], tadalafil as needed [T(PRN)]
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older · Male only
Enrollment
378 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
7
States / cities
Huntsville, Alabama • Newport Beach, California • Middlebury, Connecticut + 4 more
Source: ClinicalTrials.gov public record
Updated Nov 17, 2010 · Synced Sep 24, 2026, 4:03 PM EDT
Completed No phase listed Observational Results available

Study of Incidence of Respiratory Tract AEs in Patients Treated With Tyvaso® Compared to Other FDA Approved PAH Therapies

NCT01266265
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
inhaled prostacyclin, prostacyclin, subcutaneous and intravenous prostacyclin, oral ERA, oral PDE5 inhibitors
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
Not listed
Enrollment
1,333 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
88
States / cities
Birmingham, Alabama • Mobile, Alabama • Phoenix, Arizona + 65 more
Source: ClinicalTrials.gov public record
Updated Feb 16, 2016 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Not applicable Interventional

Therapy for Erectile Dysfunction Adaptation of ACT for Compliance With an Erectile Rehabilitation Program

NCT01275404
View directory record Official record
Conditions
Prostate Cancer
Interventions
Sexual Medicine Rehabilitation Program + nurse practitioner information phone calls, Sexual Medicine Rehabilitation Program + Acceptance and Commitment Therapy for Erectile Dysfunction
Behavioral
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
21 Years and older · Male only
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 14, 2019 · Synced Sep 24, 2026, 4:03 PM EDT
Recruiting Phase 2 Interventional

Breathe Easier With Tadalafil Therapy for Dyspnea in COPD-PH

NCT05937854
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease, Pulmonary Hypertension, Dyspnea
Interventions
Tadalafil, Placebo
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
35 Years to 89 Years
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
5
States / cities
Aurora, Colorado • Decatur, Georgia • Boston, Massachusetts + 2 more
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Sep 24, 2026, 4:03 PM EDT
Recruiting Phase 2 Interventional

A Study of Modified Release RTN-001 In Patients With Uncontrolled Hypertension

NCT07142356
View directory record Official record
Conditions
Uncontrolled Hypertension
Interventions
RTN-001, Matching placebo control
Drug
Lead sponsor
Retension Pharmaceuticals. Inc.
Industry
Eligibility
18 Years to 70 Years
Enrollment
280 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
24
States / cities
Alexander City, Alabama • Tucson, Arizona • San Jose, California + 20 more
Source: ClinicalTrials.gov public record
Updated Sep 9, 2026 · Synced Sep 24, 2026, 4:03 PM EDT
Active, not recruiting No phase listed Observational

TrEatment Approach in the Multimodal Era Registry

NCT05629052
View directory record Official record
Conditions
Chronic Thromboembolic Pulmonary Hypertension, CTEPH
Interventions
Pulmonary endarterectomy, Balloon pulmonary angioplasty, Pulmonary hypertension (PH)-specific medication
Procedure · Drug
Lead sponsor
International CTEPH Association
Other
Eligibility
18 Years and older
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
4
States / cities
San Diego, California • Evanston, Illinois • Durham, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated May 7, 2025 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 4 Interventional Results available

A Study in Erectile Dysfunction

NCT01130532
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
Tadalafil, Placebo
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older · Male only
Enrollment
623 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
34
States / cities
Huntsville, Alabama • Lancaster, California • Newport Beach, California + 31 more
Source: ClinicalTrials.gov public record
Updated Jan 3, 2013 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 3 Interventional

PHIRST-1: Tadalafil in the Treatment of Pulmonary Arterial Hypertension

NCT00125918
View directory record Official record
Conditions
Pulmonary Hypertension
Interventions
tadalafil, placebo
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
12 Years and older
Enrollment
406 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
3
States / cities
Tucson, Arizona • Minneapolis, Minnesota • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Feb 20, 2008 · Synced Sep 24, 2026, 4:03 PM EDT
Recruiting Phase 2 Interventional

A Trial of Phosphodiesterase-5 Inhibitor in Neonatal Congenital Diaphragmatic Hernia (TOP-CDH)

NCT05201144
View directory record Official record
Conditions
Congenital Diaphragmatic Hernia, Pulmonary Hypertension
Interventions
Sildenafil Oral Suspension, Placebo
Drug · Other
Lead sponsor
University of Utah
Other
Eligibility
Not listed
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 3, 2025 · Synced Sep 24, 2026, 4:03 PM EDT
Completed No phase listed Observational

Change in Penile Length Following Bilateral Nerve-Sparing Radical Prostatectomy

NCT00800813
View directory record Official record
Conditions
Prostate Cancer
Interventions
Penile Exam, Peyronie's Plaque and Erectile function assessment
Behavioral
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
21 Years and older · Male only
Enrollment
121 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 13, 2014 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Safety Study of Clinical and Immune Effects of Phosphodiesterase 4 (PDE-4) Inhibitor in Cutaneous Lupus Patients

NCT00708916
View directory record Official record
Conditions
Discoid Lupus Erythematosus
Interventions
CC-10004
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 65 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 2, 2021 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Not applicable Interventional Results available

Safety and Efficacy of Low Intensity Shockwave for the Treatment of Erectile Dysfunction

NCT03067987
View directory record Official record
Conditions
Vasculogenic Erectile Dysfunction
Interventions
Low Intensity Linear Shockwave Device for the Treatment of Erectile Dysfunction.
Device
Lead sponsor
University of Miami
Other
Eligibility
30 Years to 80 Years · Male only
Enrollment
103 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jun 10, 2020 · Synced Sep 24, 2026, 4:03 PM EDT
Completed Not applicable Interventional Results available

Phosphodiesterase Type 5 Inhibition to Improve Endothelial Function and Vascular Remodeling in Chronic Kidney Disease and End Stage Renal Disease Patients Requiring New Arteriovenous Fistula

NCT02414204
View directory record Official record
Conditions
Improve Endothelial Function and Decrease Vascular Stenosis
Interventions
Sildenafil, Placebo
Drug · Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years to 99 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 11, 2019 · Synced Sep 24, 2026, 4:03 PM EDT