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ClinicalTrials.gov public records Last synced Oct 6, 2026, 10:55 PM EDT

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Showing 25–48 of 177 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Viagra (sildenafil citrate) Clear all
Terminated Phase 2 Interventional Results available

A Research Study To Assess The Effectiveness And Safety Of Different Doses Of Oral PF-00489791 In The Treatment Of Adult Patients With Pulmonary Arterial Hypertension

NCT00853112
View directory record Official record
Conditions
Hypertension, Pulmonary
Interventions
PF-00489791, placebo, sildenafil
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
8
States / cities
Phoenix, Arizona • Gainesville, Florida • Omaha, Nebraska + 2 more
Source: ClinicalTrials.gov public record
Updated Oct 24, 2017 · Synced Oct 6, 2026, 10:55 PM EDT
Completed Phase 4 Interventional

Characterization of LV Strain Patterns in Mildly Elevated PCWP and PAH.

NCT01800292
View directory record Official record
Conditions
Hypertension, Pulmonary Artery, Ventricular Dysfunction, Left
Interventions
sildenafil
Drug
Lead sponsor
University of Arizona
Other
Eligibility
18 Years to 80 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Nov 4, 2015 · Synced Oct 6, 2026, 10:55 PM EDT
Terminated Not applicable Interventional Results available

Improving Erectile Function and Quality of Life After Prostate Cancer Treatment

NCT01996852
View directory record Official record
Conditions
Prostate Cancer, Erectile Dysfunction Following Radical Prostatectomy, Erectile Dysfunction Following Simple Prostatectomy, Erectile Dysfunction
Interventions
Cognitive-behavioral Meetings, sildenafil citrate, Vacuum Constriction Device
Behavioral · Drug · Device
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
21 Years and older · Male only
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated May 10, 2019 · Synced Oct 6, 2026, 10:55 PM EDT
Terminated Phase 1 Interventional

Sildenafil and Stroke Recovery

NCT02628847
View directory record Official record
Conditions
Stroke
Interventions
sildenafil citrate, Placebo
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 80 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 5, 2017 · Synced Oct 6, 2026, 10:55 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

A Study of Visual Effects of Erectile Dysfunction Medications Dosed Daily for Six Months

NCT00333281
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
tadalafil
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
30 Years to 65 Years · Male only
Enrollment
198 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Oct 25, 2007 · Synced Oct 6, 2026, 10:55 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 6, 2026, 10:55 PM EDT
Completed Phase 2 Interventional

Sildenafil Citrate in Waldenstrom's Macroglobulinemia

NCT00165295
View directory record Official record
Conditions
Waldenstrom's Macroglobulinemia
Interventions
Sildenafil citrate (Viagra)
Drug
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 27, 2011 · Synced Oct 6, 2026, 10:55 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 6, 2026, 10:55 PM EDT
Completed Phase 2 Interventional

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

NCT00645034
View directory record Official record
Conditions
Benign Prostatic Hyperplasia
Interventions
placebo, sildenafil
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
35 Years to 75 Years · Male only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2003
U.S. locations
2
States / cities
Laguna Woods, California • Newport Beach, California
Source: ClinicalTrials.gov public record
Updated Feb 1, 2021 · Synced Oct 6, 2026, 10:55 PM EDT
Terminated Phase 2 Interventional Results available

Study of Sildenafil to Treat Newborns With Persistent Pulmonary Hypertension

NCT01409031
View directory record Official record
Conditions
Persistent Pulmonary Hypertension, Respiratory Failure
Interventions
Intravenous Sildenafil, Placebo
Drug · Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
Up to 72 Hours
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
7
States / cities
Aurora, Colorado • Chicago, Illinois • Buffalo, New York + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 1, 2019 · Synced Oct 6, 2026, 10:55 PM EDT
Not yet recruiting Early Phase 1 Interventional

Asciminib With or Without Sildenafil for Brain Tumors

NCT07039760
View directory record Official record
Conditions
Brain Tumor
Interventions
Asciminib, Sildenafil, Surgical resection or biopsy
Drug · Procedure
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 39 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 11, 2026 · Synced Oct 6, 2026, 10:55 PM EDT
Completed No phase listed Observational

Modulating Effects of Lisinopril on Sildenafil Activity in Pulmonary Arterial Hypertension(PAH)( MELISSA)

NCT01181284
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Not listed
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 7, 2012 · Synced Oct 6, 2026, 10:55 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 6, 2026, 10:55 PM EDT
Completed Phase 4 Interventional

A Multicenter, Double-blind Study to Evaluate the Effect of Pretreatment With a Daily Dose of Sildenafil on the As-Needed Efficacy of Viagra in Men With Erectile Dysfunction and Type 2 Diabetes

NCT00645268
View directory record Official record
Conditions
Erectile Dysfunction, Diabetes Mellitus, Type 2
Interventions
sildenafil, placebo
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
35 Years to 70 Years · Male only
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2004
U.S. locations
28
States / cities
Huntsville, Alabama • Phoenix, Arizona • Beverly Hills, California + 21 more
Source: ClinicalTrials.gov public record
Updated Feb 1, 2021 · Synced Oct 6, 2026, 10:55 PM EDT
Completed Phase 2 Interventional Results available

Safety of Sildenafil in Premature Infants With Severe Bronchopulmonary Dysplasia

NCT04447989
View directory record Official record
Conditions
Bronchopulmonary Dysplasia of Newborn
Interventions
Sildenafil, Placebo
Drug
Lead sponsor
Christoph Hornik
Other
Eligibility
Up to 29 Weeks
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
25
States / cities
Little Rock, Arkansas • San Diego, California • Washington D.C., District of Columbia + 19 more
Source: ClinicalTrials.gov public record
Updated Jan 26, 2026 · Synced Oct 6, 2026, 10:55 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 6, 2026, 10:55 PM EDT
Completed No phase listed Observational

Eisenmenger's Syndrome in Adults With CHD

NCT00266903
View directory record Official record
Conditions
Congenital Disorders
Interventions
Not listed
Lead sponsor
Children's Healthcare of Atlanta
Other
Eligibility
18 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2008
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Dec 2, 2014 · Synced Oct 6, 2026, 10:55 PM EDT
Completed Early Phase 1 Interventional

Tadalafil and Sildenafil for Duchenne Muscular Dystrophy

NCT01359670
View directory record Official record
Conditions
Duchenne Muscular Dystrophy
Interventions
Tadalafil, Sildenafil
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
7 Years to 15 Years · Male only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 14, 2020 · Synced Oct 6, 2026, 10:55 PM EDT
Not yet recruiting Phase 1 Interventional Accepts healthy volunteers

Hezkue®, Hezkue Turbo®, and Commercial Sildenafil Products in Fed Healthy Male Subject

NCT07117383
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
ASP-001.1, ASP-001, Commercial Sildenafil and Sildenafil/Tadalafil Products
Device · Drug
Lead sponsor
Aspargo Labs, Inc
Industry
Eligibility
18 Years to 70 Years · Male only
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 12, 2025 · Synced Oct 6, 2026, 10:55 PM EDT
Terminated Phase 4 Interventional Results available

Renin-Angiotensin and Fibrinolysis in Humans: Effect of Long-Term PDE5 Inhibition on Glucose Homeostasis

NCT01409993
View directory record Official record
Conditions
Impaired Glucose Tolerance
Interventions
Sildenafil, Placebo, Hyperglycemic clamp, Euglycemic clamp
Drug · Diagnostic Test
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years and older
Enrollment
78 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 17, 2017 · Synced Oct 6, 2026, 10:55 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 6, 2026, 10:55 PM EDT
Completed Phase 1 Interventional

Treatment of Palmar Plantar Erythrodysesthesia (PPE) With Topical Sildenafil

NCT01219023
View directory record Official record
Conditions
Hand Foot Syndrome, Palmar Plantar Erythrodysesthesia
Interventions
sildenafil citrate
Drug
Lead sponsor
Duke University
Other
Eligibility
18 Years to 90 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 30, 2012 · Synced Oct 6, 2026, 10:55 PM EDT
Completed Phase 2 Interventional Results available

Effects of Sildenafil on CFTR-dependent Ion Transport Activity

NCT01132482
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Sildenafil, Placebo
Drug
Lead sponsor
National Jewish Health
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 19, 2019 · Synced Oct 6, 2026, 10:55 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 6, 2026, 10:55 PM EDT