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 come from ClinicalTrials.gov. When the live registry is unavailable, a clearly labeled stored copy may be shown.

Clear filters

These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.

ClinicalTrials.gov public records Last synced Oct 1, 2026, 8:57 PM EDT

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

Showing 1–24 of 27 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Oral Sildenafil 50 mg Clear all
Completed Phase 2Phase 3 Interventional Results available

Sildenafil to Improve Exercise Capacity in People With Thalassemia and Pulmonary Hypertension

NCT00872170
View directory record Official record
Conditions
Thalassemia, Hypertension, Pulmonary
Interventions
Sildenafil
Drug
Lead sponsor
Carelon Research
Other
Eligibility
7 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Oakland, California
Source: ClinicalTrials.gov public record
Updated Feb 21, 2014 · Synced Oct 1, 2026, 8:57 PM EDT
Terminated Phase 2 Interventional Results available

Does Sildenafil Improve Endothelial Dysfunction in Rheumatoid Arthritis?

NCT02908490
View directory record Official record
Conditions
Arthritis, Rheumatoid, Atherosclerosis
Interventions
Sildenafil, Placebo
Drug · Other
Lead sponsor
Kimberly Liang
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 13, 2021 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 2 Interventional Results available

Sorafenib, Valproic Acid, and Sildenafil in Treating Patients With Recurrent High-Grade Glioma

NCT01817751
View directory record Official record
Conditions
Glioblastoma, Recurrent Adult Brain Neoplasm, Malignant Glioma, WHO Grade III Glioma
Interventions
sorafenib tosylate, valproic acid, sildenafil citrate
Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2023
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 17, 2024 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 2 Interventional Results available

Improving Right Ventricular Function in Young Adults Born Preterm

NCT03696758
View directory record Official record
Conditions
Infant,Premature
Interventions
Pulmonary Function Testing, Electrocardiogram, Cardiac Magnetic Resonance Imaging, Metoprolol, Sildenafil
Procedure · Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 35 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 17, 2021 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety, Tolerability, and PK Parameters of Sodium Nitrite Inhalation Solution in Healthy Subjects

NCT01409122
View directory record Official record
Conditions
Pulmonary Hypertension, Pulmonary Arterial Hypertension
Interventions
15 mg sodium nitrite inhalation solution, 90 mg sodium nitrite inhalation solution, 45 mg sodium nitrite inhalation solution, 120 mg sodium nitrite inhalation solution, 25% MTD sodium nitrite inhalation solution
Drug
Lead sponsor
Aires Pharmaceuticals, Inc.
Industry
Eligibility
18 Years to 56 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 9, 2012 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Compare the Blood Levels of Sildenafil Following Administration of an Experimental Tablet vs. the Conventional Oral Tablet in Healthy Subjects

NCT00866463
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
Sildenafil
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
18 Years to 55 Years · Male only
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 1, 2021 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Not applicable Interventional Results available

Nebivolol in the Supine Hypertension of Autonomic Failure

NCT01044693
View directory record Official record
Conditions
Hypertension, Pure Autonomic Failure, Multiple System Atrophy
Interventions
Placebo, Nebivolol 5 mg, metoprolol tartrate 50 mg, Sildenafil25 mg
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated May 1, 2015 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study to Compare the Blood Levels of Sildenafil Following Administration of an Experimental Tablet vs. the Conventional Oral Tablet in Healthy Subjects.

NCT00795938
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
Sildenafil
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
18 Years to 55 Years · Male only
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 1, 2021 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Does Sildenafil Increase Exercise Performance in Air Pollution?

NCT00808912
View directory record Official record
Conditions
Pulmonary Hypertension, Pulmonary Artery Pressure, Exercise Performance, Air Pollution
Interventions
sildenafil, placebo
Drug · Other
Lead sponsor
Marywood University
Other
Eligibility
18 Years to 30 Years · Male only
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Scranton, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 23, 2010 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Sildenafil for Swimming-Induced Pulmonary Edema (SIPE) Prevention

NCT03686813
View directory record Official record
Conditions
Edema, Pulmonary, Immersion, Diving
Interventions
Sildenafil Citrate, Placebo Oral Tablet
Drug
Lead sponsor
Duke University
Other
Eligibility
18 Years to 45 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 22, 2022 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 4 Interventional Results available

Study of Add-on Ambrisentan Therapy to Background Phosphodiesterase Type-5 Inhibitor (PDE5i) Therapy in Pulmonary Arterial Hypertension (ATHENA-1)

NCT00617305
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Ambrisentan, Placebo, Sildenafil, Tadalafil
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
16 Years to 75 Years
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
30
States / cities
Mobile, Alabama • Phoenix, Arizona • Los Angeles, California + 25 more
Source: ClinicalTrials.gov public record
Updated Jul 30, 2012 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 3 Interventional

A New Sildenafil Oral Film in Patients With Erectile Dysfunction

NCT05490680
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
Sildenafil Oral Film 25 mg, 50 mg, 75 mg or 100 mg, Placebo
Drug
Lead sponsor
IBSA Institut Biochimique SA
Industry
Eligibility
18 Years and older · Male only
Enrollment
488 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
18
States / cities
Foley, Alabama • Huntsville, Alabama • Little Rock, Arkansas + 14 more
Source: ClinicalTrials.gov public record
Updated Oct 23, 2025 · Synced Oct 1, 2026, 8:57 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Non-invasive Measurement of Cerebrovascular Reactivity After Traumatic Brain Injury

NCT02990078
View directory record Official record
Conditions
TBI
Interventions
Sildenafil citrate, Functional Near Infared Spectroscopy, Hypercapnia Challenge
Drug · Device · Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 13, 2022 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Bioavailability of 3 Sildenafil Oral Disintegrating Tablet Formulations Compared to the Standard Oral Tablet

NCT00950404
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Viagra 50 mg tablet, Formulation B ODT tablet 50 mg, Formulation C ODT tablet 50 mg, Formulation D ODT tablet 50 mg
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 1, 2021 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 4 Interventional

A Study Of The Safety and Efficacy Of Viagra In Men With Erectile Dysfunction Who Do Not Self Identify.

NCT00343200
View directory record Official record
Conditions
Impotence
Interventions
Placebo, Viagra (sildenafil citrate)
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
30 Years and older · Male only
Enrollment
371 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
48
States / cities
Huntsville, Alabama • Mesa, Arizona • Phoenix, Arizona + 42 more
Source: ClinicalTrials.gov public record
Updated Feb 1, 2021 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Prevention and Treatment of Immersion Pulmonary Edema

NCT00815646
View directory record Official record
Conditions
Immersion Pulmonary Edema (IPE), Swimming Induced Pulmonary Edema (SIPE)
Interventions
Sildenafil
Drug
Lead sponsor
Duke University
Other
Eligibility
18 Years to 55 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2015
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 26, 2016 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 2 Interventional

An Open-Label, Extension Study Evaluating the Safety, Toleration, and Efficacy of Sildenafil in Women With Sexual Arousal Disorder

NCT00746967
View directory record Official record
Conditions
Sexual Dysfunctions, Psychological, Sexual Arousal Disorder
Interventions
sildenafil
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
18 Years and older · Female only
Enrollment
267 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2004
U.S. locations
82
States / cities
Huntsville, Alabama • Anchorage, Alaska • Tucson, Arizona + 68 more
Source: ClinicalTrials.gov public record
Updated Feb 1, 2021 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Blood Flow and Vascular Function in Cystic Fibrosis

NCT02057458
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Sildenafil (Acute-1 hour), Sildenafil (Subchronic-4 weeks), Placebo
Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 24, 2020 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 1 Interventional

Growth Hormone or Sildenafil as Therapies for Fatigue in Mild- Traumatic-brain-injury (MTBI)

NCT02114775
View directory record Official record
Conditions
Traumatic Brain Injury
Interventions
Growth Hormone, Sildenafil, Placebo
Drug
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
18 Years to 60 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 5, 2018 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Sildenafil for Cerebrovascular Dysfunction in Chronic Traumatic Brain Injury.

NCT01762475
View directory record Official record
Conditions
Traumatic Brain Injury, Post-concussive Syndrome
Interventions
Sildenafil
Drug
Lead sponsor
Uniformed Services University of the Health Sciences
Federal
Eligibility
18 Years to 55 Years
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 1, 2016 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 3 Interventional Results available

Study of Sildenafil Citrate During and After Radiotherapy/Hormone Therapy for Erectile Function Versus Radiotherapy/Hormone Therapy for Prostate Cancer

NCT00142506
View directory record Official record
Conditions
Prostate Cancer, Erectile Dysfunction
Interventions
sildenafil citrate and questionaires, placebo tablets and questionaires
Drug
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
Male only
Enrollment
290 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2014
U.S. locations
5
States / cities
Basking Ridge, New Jersey • Commack, New York • New York, New York + 2 more
Source: ClinicalTrials.gov public record
Updated Oct 20, 2017 · Synced Oct 1, 2026, 8:57 PM EDT
Terminated Phase 1 Interventional

Sildenafil (Viagra) Treatment of Subacute Ischemic Stroke

NCT00452582
View directory record Official record
Conditions
Ischemic Stroke
Interventions
Sildenafil (Viagra), Usual care
Drug · Other
Lead sponsor
Henry Ford Health System
Other
Eligibility
18 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2005
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 16, 2011 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Single-Dose Relative Bioavailability Study of SST-6006, a Topical Sildenafil Cream Versus Oral Sildenafil in Healthy Male Adults

NCT01986673
View directory record Official record
Conditions
Healthy
Interventions
5% Sildenafil Cream (SST-6006), Oral Sildenafil 50 mg
Drug
Lead sponsor
Strategic Science & Technologies, LLC
Industry
Eligibility
18 Years to 55 Years · Male only
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jan 27, 2014 · Synced Oct 1, 2026, 8:57 PM EDT
Completed Phase 4 Interventional Results available

Effects of Viagra on Heart Function in Patients With Heart Failure

NCT00781508
View directory record Official record
Conditions
Heart Failure, Left Ventricular Dysfunction
Interventions
sildenafil, Placebo
Drug · Other
Lead sponsor
MetroHealth Medical Center
Other
Eligibility
25 Years to 75 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 2, 2014 · Synced Oct 1, 2026, 8:57 PM EDT