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 29, 2026, 6:13 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 177 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Sildenafil citrate Clear all
Terminated No phase listed Observational

Pharmacokinetics and Pharmacdynamics of Sildenafil

NCT00718185
View directory record Official record
Conditions
Pulmonary Hypertension
Interventions
Obtain blood specimens
Procedure
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
28 Days and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 12, 2015 · Synced Oct 29, 2026, 6:13 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Effect of Sildenafil Citrate (Viagra® (Registered Trademark)) on Brain Blood Flow in Multiple Sclerosis Patients

NCT00094068
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Not listed
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
Not listed
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2006
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 4, 2008 · Synced Oct 29, 2026, 6:13 PM EDT
Terminated Phase 1 Interventional

Cerebrovascular Reactivity in American Football Players

NCT03417492
View directory record Official record
Conditions
Traumatic Brain Injury, Mild Traumatic Brain Injury, Post-Concussion Syndrome
Interventions
Sildenafil Citrate
Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
40 Years to 65 Years · Male only
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 21, 2022 · Synced Oct 29, 2026, 6:13 PM EDT
Completed Phase 1 Interventional

Doxorubicin With or Without Sildenafil, With Analysis of Cardiac Markers

NCT01375699
View directory record Official record
Conditions
Breast Cancer, Gastrointestinal Cancer, Genitourinary Cancer, Sarcoma, Gynecologic Cancer
Interventions
Doxorubicin, Sildenafil
Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2018
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 26, 2019 · Synced Oct 29, 2026, 6:13 PM EDT
Terminated Phase 4 Interventional Results available

Effects of Oral Sildenafil on Mortality in Adults With PAH

NCT02060487
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
sildenafil citrate
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
18 Years to 74 Years
Enrollment
385 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2021
U.S. locations
11
States / cities
Atlanta, Georgia • Grand Rapids, Michigan • Wooster, Ohio + 2 more
Source: ClinicalTrials.gov public record
Updated May 13, 2022 · Synced Oct 29, 2026, 6:13 PM EDT
Completed Phase 1 Interventional

Sildenafil Citrate Before Surgery in Improving Kidney Function in Patients With Kidney Cancer

NCT01950923
View directory record Official record
Conditions
Kidney Tumor
Interventions
sildenafil citrate, placebo, therapeutic conventional surgery
Drug · Other · Procedure
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 3, 2018 · Synced Oct 29, 2026, 6:13 PM EDT
Terminated Phase 3 Interventional Results available

Sitaxsentan Efficacy And Safety Trial With A Randomized Prospective Assessment Of Adding Sildenafil (SR-PAAS)

NCT00795639
View directory record Official record
Conditions
Pulmonary Arterial Hypertension, Pulmonary Hypertension
Interventions
Sitaxsentan, Placebo
Drug
Lead sponsor
Pfizer
Industry
Eligibility
16 Years to 80 Years
Enrollment
183 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
32
States / cities
Fountain Valley, California • Mather, California • Sacramento, California + 28 more
Source: ClinicalTrials.gov public record
Updated Mar 24, 2015 · Synced Oct 29, 2026, 6:13 PM EDT
Completed Phase 3 Interventional

Mono vs. Dual Therapy for Pediatric Pulmonary Arterial Hypertension

NCT04039464
View directory record Official record
Conditions
Pediatric Pulmonary Hypertension
Interventions
Mono-Therapy with Sildenafil, Duo-Therapy with Sildenafil + Bosentan
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
3 Months to 18 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
10
States / cities
Aurora, Colorado • St. Petersburg, Florida • Baltimore, Maryland + 7 more
Source: ClinicalTrials.gov public record
Updated Feb 18, 2026 · Synced Oct 29, 2026, 6:13 PM EDT
Terminated Early Phase 1 Interventional Results available

Testosterone for Penile Rehabilitation After Radical Prostatectomy

NCT00848497
View directory record Official record
Conditions
Hypogonadism, Erectile Dysfunction
Interventions
Testim®, Placebo Testim®, Viagra®
Drug · Other
Lead sponsor
Mohit Khera
Other
Eligibility
18 Years and older · Male only
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2013
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 19, 2015 · Synced Oct 29, 2026, 6:13 PM EDT
Completed Phase 2 Interventional

Nerve-Sparing Radical Prostatectomy With or Without Nerve Grafting Followed by Standard Therapy for Erectile Dysfunction in Treating Patients With Localized Prostate Cancer

NCT00080808
View directory record Official record
Conditions
Prostate Cancer
Interventions
Alprostadil (E1), Papaverine, Phentolamine mesylate, Sildenafil citrate, conventional surgery
Drug · Procedure
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
Up to 65 Years · Male only
Enrollment
111 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2009
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 30, 2012 · Synced Oct 29, 2026, 6:13 PM EDT
Terminated Phase 1 Interventional

A Phase 1, Open-Label Study of Intravenous Sildenafil in Patients With Cirrhosis

NCT01954524
View directory record Official record
Conditions
Cirrhosis
Interventions
IV bolus injection of Sildenafil
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 15, 2022 · Synced Oct 29, 2026, 6:13 PM EDT
Completed Phase 4 Interventional

A Placebo-Controlled Single-Dose Trial of Sildenafil in Schizophrenia

NCT00455715
View directory record Official record
Conditions
Schizophrenia
Interventions
Sildenafil
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 29, 2011 · Synced Oct 29, 2026, 6:13 PM EDT
Completed Not applicable Interventional Results available

Effect of Sildenafil on Diffusion Capacity in Patients With PH and Parenchymal Lung Disease

NCT01948518
View directory record Official record
Conditions
Diffuse Parenchymal Lung Disease, Pulmonary Hypertension
Interventions
Oral sildenafil 20 mg
Drug
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 30, 2014 · Synced Oct 29, 2026, 6:13 PM EDT
Completed Phase 4 Interventional

Study of Sildenafil for Treatment of SSRI-Antidepressant Sexual Dysfunction in Women

NCT00375297
View directory record Official record
Conditions
Sexual Dysfunction, Depression
Interventions
sildenafil
Drug
Lead sponsor
University of New Mexico
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2005
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Sep 12, 2006 · Synced Oct 29, 2026, 6:13 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study Investigating the Safety, Tolerability, Drug Levels and Drug Effect of BMS-986278 in Healthy Adult Participants (Part 1) and Japanese Participants (Part 2)

NCT05684289
View directory record Official record
Conditions
Healthy Participants
Interventions
BMS-986278, Sildenafil, Placebo
Drug
Lead sponsor
Bristol-Myers Squibb
Industry
Eligibility
35 Years to 65 Years
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
2
States / cities
Cypress, California • Miami, Florida
Source: ClinicalTrials.gov public record
Updated Aug 24, 2023 · Synced Oct 29, 2026, 6:13 PM EDT
Completed Phase 4 Interventional Results available

Assess the Efficacy and Safety of Sildenafil When Added to Bosentan in the Treatment of Pulmonary Arterial Hypertension

NCT00323297
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Bosentan, Placebo, Sildenafil Citrate
Drug · Other
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
18 Years and older
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2013
U.S. locations
6
States / cities
Los Angeles, California • Detroit, Michigan • Pittsburgh, Pennsylvania + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 1, 2021 · Synced Oct 29, 2026, 6:13 PM EDT
Completed Phase 4 Interventional Results available

Effect of Testosterone in Men With Erectile Dysfunction

NCT00512707
View directory record Official record
Conditions
Erectile Dysfunction, Testosterone Deficiency, Diabetes
Interventions
Sildenafil citrate (open label), Testosterone gel, Placebo gel
Drug · Other
Lead sponsor
Boston University
Other
Eligibility
40 Years to 70 Years · Male only
Enrollment
140 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 29, 2017 · Synced Oct 29, 2026, 6:13 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 29, 2026, 6:13 PM EDT
Completed Phase 4 Interventional Results available

Acute Hemodynamic Effects of Sildenafil in Patients With Severe Aortic Stenosis

NCT01060020
View directory record Official record
Conditions
Aortic Stenosis
Interventions
Sildenafil
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 25, 2018 · Synced Oct 29, 2026, 6:13 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 23, 2026 · Synced Oct 29, 2026, 6:13 PM EDT
Completed Phase 4 Interventional

An Open Label, Dose Finding Trial of Viagra for the Treatment of Neuropathic Pain (in Diabetes Mellitus)

NCT00194909
View directory record Official record
Conditions
Diabetic Neuropathy
Interventions
sildenafil (Viagra)
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 25, 2008 · Synced Oct 29, 2026, 6:13 PM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers

Cerebrovascular Reactivity Assessed With fNIRS as a Biomarker of TCVI After Acute Traumatic Brain Injury in Military

NCT04058132
View directory record Official record
Conditions
Traumatic Brain Injury
Interventions
Sildenafil Citrate 50Mg Tab, functional Near-infrared Spectroscopy (fNIRS), Carbon Dioxide (CO2) 5%, Neuropsychological Assessments, Gadolinium contrast infusion, Blood sample collection for research purposes, Structural brain Magnetic Resonance Imaging (MRI
Drug · Device · Other + 1 more
Lead sponsor
Uniformed Services University of the Health Sciences
Federal
Eligibility
18 Years to 55 Years
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 28, 2024 · Synced Oct 29, 2026, 6:13 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

PDE Inhibitors in DMD Study (Acute Dosing Study)

NCT01580501
View directory record Official record
Conditions
Duchenne Muscular Dystrophy
Interventions
Tadalafil and Sildenafil
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
7 Years to 15 Years · Male only
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2012
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 28, 2014 · Synced Oct 29, 2026, 6:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Renin-Angiotensin Aldosterone System and Fibrinolysis Interaction in Humans-Specific Aim 3

NCT00685945
View directory record Official record
Conditions
Obesity
Interventions
Control (bradykinin), L-NMMA + bradykinin, Isosorbide + L-NMMA + bradykinin, Sildenafil + L-NMMA + bradykinin
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 70 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Feb 25, 2013 · Synced Oct 29, 2026, 6:13 PM EDT