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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Sildenafil 2 Clear all
Completed No phase listed Observational

Thalassemia (Cooley's Anemia) Clinical Research Network (TCRN)

NCT00000623
View directory record Official record
Conditions
Anemia, Cooley's, Beta-Thalassemia, Hematologic Diseases, Thalassemia, Osteoporosis, Iron Overload, Hypertension, Pulmonary
Interventions
Deferoxamine, Deferiprone, Arginine, Sildenafil, Decitabine
Drug
Lead sponsor
Carelon Research
Other
Eligibility
1 Year to 75 Years
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2006
U.S. locations
4
States / cities
Oakland, California • Boston, Massachusetts • New York, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 3, 2014 · Synced Sep 24, 2026, 9:40 AM 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 27, 2014 · Synced Sep 24, 2026, 9:40 AM EDT
Completed Early Phase 1 Interventional

Topical Sildenafil as Pre-Treatment for Hand-Foot Skin Reaction

NCT03229512
View directory record Official record
Conditions
Hand Foot Skin Reaction
Interventions
Sildenafil
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
2
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 31, 2021 · Synced Sep 24, 2026, 9:40 AM 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 Jan 31, 2021 · Synced Sep 24, 2026, 9:40 AM EDT
Completed Phase 2 Interventional

Study to Investigate Effect of Sildenafil on Clitoral Engorgement as Measured by Magnetic Resonance Imaging (MRI) in Pre-menopausal Women With Female Sexual Arousal Disorder

NCT00640458
View directory record Official record
Conditions
Female Sexual Arousal Disorder
Interventions
Sildenafil 100 mg, Placebo
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
18 Years to 45 Years · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
2
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 31, 2021 · Synced Sep 24, 2026, 9:40 AM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

Multi-Center Study to Evaluate the Efficacy and Safety of Sildenafil Cream (3.6%) in Premenopausal Patients With Female Sexual Arousal Disorder

NCT04948151
View directory record Official record
Conditions
Female Sexual Arousal Disorder
Interventions
Sildenafil, Placebo
Drug
Lead sponsor
Strategic Science & Technologies, LLC
Industry
Eligibility
21 Years and older · Female only
Enrollment
440 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
51
States / cities
Mobile, Alabama • Phoenix, Arizona • Tucson, Arizona + 45 more
Source: ClinicalTrials.gov public record
Updated Jun 30, 2021 · Synced Sep 24, 2026, 9:40 AM 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 29, 2012 · Synced Sep 24, 2026, 9:40 AM 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 26, 2011 · Synced Sep 24, 2026, 9:40 AM 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 1, 2014 · Synced Sep 24, 2026, 9:40 AM 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 Jan 31, 2019 · Synced Sep 24, 2026, 9:40 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Sildenafil Treatment for Mild TBI

NCT03598140
View directory record Official record
Conditions
Vascular System Injuries, Concussion, Brain, Post-Concussion Syndrome
Interventions
Sildenafil Citrate, Placebo oral capsule
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Nov 18, 2020 · Synced Sep 24, 2026, 9:40 AM EDT
Completed Phase 3 Interventional Results available

The Efficacy and Safety of Sildenafil Citrate Used in Combination With Intravenous Epoprostenol in PAH

NCT00159861
View directory record Official record
Conditions
Pulmonary Hypertension
Interventions
Sildenafil citrate
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
16 Years and older
Enrollment
267 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
33
States / cities
La Jolla, California • Los Angeles, California • San Diego, California + 21 more
Source: ClinicalTrials.gov public record
Updated Jan 31, 2021 · Synced Sep 24, 2026, 9:40 AM 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 19, 2017 · Synced Sep 24, 2026, 9:40 AM EDT
Completed No phase listed Observational Results available

A Study to Determine if There is a Possible Association Between NAION and Phosphodiesterase Type 5 (PDE5) Inhibitors

NCT01131104
View directory record Official record
Conditions
Nonarteritic Anterior Ischemic Optic Neuropathy
Interventions
PDE5 Inhibitors
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older · Male only
Enrollment
345 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
44
States / cities
Birmingham, Alabama • Los Altos, California • National City, California + 40 more
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Sep 24, 2026, 9:40 AM EDT
Terminated Phase 1 Interventional

Study of Low Dose Nesiritide With or Without Sildenafil in Congestive Heart Failure Patients With Renal Dysfunction

NCT00818701
View directory record Official record
Conditions
Congestive Heart Failure, Renal Dysfunction
Interventions
low dose Nesiritide, nesiritide, Sildenafil
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 90 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
2
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 23, 2010 · Synced Sep 24, 2026, 9:40 AM EDT
Completed Phase 4 Interventional

Mild To Moderate Erectile Dysfunction Study

NCT00137072
View directory record Official record
Conditions
Impotence
Interventions
Viagra (Sildenafil Citrate) 100 mg
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
18 Years to 70 Years · Male only
Enrollment
355 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
33
States / cities
Birmingham, Alabama • Homewood, Alabama • Hoover, Alabama + 30 more
Source: ClinicalTrials.gov public record
Updated Jan 31, 2021 · Synced Sep 24, 2026, 9:40 AM EDT
Completed Phase 2 Interventional Results available

Sildenafil for the Treatment of Lymphatic Malformations

NCT02335242
View directory record Official record
Conditions
Lymphatic Malformations, Lymphatic Diseases
Interventions
Sildenafil 20 mg tablets, Placebo tablets (resembling Revatio)
Drug · Other
Lead sponsor
Stanford University
Other
Eligibility
6 Months to 10 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2021
U.S. locations
3
States / cities
Stanford, California • Aurora, Colorado • Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 16, 2022 · Synced Sep 24, 2026, 9:40 AM EDT
Completed Phase 2 Interventional Results available

Sildenafil Study to Treat Idiopathic Pulmonary Fibrosis

NCT00359736
View directory record Official record
Conditions
Alveolitis, Fibrosing, Fibrosis, Pulmonary, Hypertension, Pulmonary
Interventions
sildenafil
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
40 Years to 85 Years
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Oct 31, 2017 · Synced Sep 24, 2026, 9:40 AM 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 28, 2011 · Synced Sep 24, 2026, 9:40 AM 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 12, 2022 · Synced Sep 24, 2026, 9:40 AM EDT
Completed Phase 3 Interventional Results available

Role of Sildenafil for Fontan Associated Liver Disease (SiFALD) Study

NCT03154476
View directory record Official record
Conditions
Cirrhosis, Congenital Heart Disease
Interventions
Sildenafil, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 22, 2021 · Synced Sep 24, 2026, 9:40 AM EDT
Completed Phase 3 Interventional

Study to Assess the Longterm Safety of Sildenafil Citrate in Patients With Pulmonary Arterial Hypertension

NCT00159887
View directory record Official record
Conditions
Pulmonary Hypertension
Interventions
Sildenafil citrate
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
18 Years and older
Enrollment
260 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2007
U.S. locations
24
States / cities
Birmingham, Alabama • La Jolla, California • Los Angeles, California + 13 more
Source: ClinicalTrials.gov public record
Updated Jan 31, 2021 · Synced Sep 24, 2026, 9:40 AM EDT
Completed Phase 2 Interventional

Sildenafil to Increase Exercise Capacity in Individuals With Idiopathic Pulmonary Fibrosis and Pulmonary Hypertension

NCT00352482
View directory record Official record
Conditions
Pulmonary Fibrosis, Hypertension, Pulmonary
Interventions
Sildenafil (50 mg)
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
19 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 28, 2016 · Synced Sep 24, 2026, 9:40 AM EDT
Terminated Phase 4 Interventional Results available

Sildenafil in Heart Failure With Reactive Pulmonary Hypertension

NCT02304705
View directory record Official record
Conditions
Heart Failure With Reactive Pulmonary Hypertension
Interventions
Sildenafil, Placebo
Drug
Lead sponsor
Maya Guglin
Other
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Nov 6, 2019 · Synced Sep 24, 2026, 9:40 AM EDT