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ClinicalTrials.gov public records Last synced Oct 14, 2026, 10:53 AM EDT

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Showing 97–120 of 177 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Sildenafil citrate (Viagra) Clear all
Withdrawn Phase 1 Interventional

Study of Sildenafil as a Therapy for Fatigue in Pancreatic Cancer

NCT02106871
View directory record Official record
Conditions
Pancreatic Cancer, Cholangiocarcinoma
Interventions
Sildenafil
Drug
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
40 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Oct 27, 2017 · Synced Oct 14, 2026, 10:53 AM EDT
Completed Phase 3 Interventional Results available

Sildenafil Trial of Exercise Performance in Idiopathic Pulmonary Fibrosis

NCT00517933
View directory record Official record
Conditions
Pulmonary Fibrosis, Hypertension, Pulmonary
Interventions
Sildenafil Citrate, Placebo
Drug · Other
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
13
States / cities
Birmingham, Alabama • Los Angeles, California • San Francisco, California + 10 more
Source: ClinicalTrials.gov public record
Updated Jun 24, 2015 · Synced Oct 14, 2026, 10:53 AM 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 14, 2026, 10:53 AM 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 14, 2026, 10:53 AM 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 14, 2026, 10:53 AM EDT
Completed Phase 4 Interventional

Study Of Men With Mild To Moderate Erectile Dysfunction To Evaluate The Efficacy Of Viagra 8 Hours Post-Dose

NCT00143260
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
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
25
States / cities
Birmingham, Alabama • Homewood, Alabama • Hoover, Alabama + 22 more
Source: ClinicalTrials.gov public record
Updated Feb 1, 2021 · Synced Oct 14, 2026, 10:53 AM EDT
Active, not recruiting Phase 2 Interventional

Sildenafil for Treatment of Urinary Incontinence in Patients With Spinal Cord Injuries

NCT04565925
View directory record Official record
Conditions
Spinal Cord Injuries, Urinary Incontinence
Interventions
Sildenafil Citrate, Placebo
Drug
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
18 Years to 70 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
2
States / cities
College Station, Texas • Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 9, 2026 · Synced Oct 14, 2026, 10:53 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 17, 2022 · Synced Oct 14, 2026, 10:53 AM EDT
Terminated Phase 2 Interventional Results available

Sildenafil Therapy for Pulmonary Hypertension and Sickle Cell Disease

NCT00492531
View directory record Official record
Conditions
Sickle Cell Disease, Pulmonary Hypertension
Interventions
Sildenafil, Placebo
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
12 Years to 70 Years
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
8
States / cities
Oakland, California • Denver, Colorado • Washington D.C., District of Columbia + 5 more
Source: ClinicalTrials.gov public record
Updated Jan 6, 2016 · Synced Oct 14, 2026, 10:53 AM 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 14, 2026, 10:53 AM 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 14, 2026, 10:53 AM 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 9, 2018 · Synced Oct 14, 2026, 10:53 AM 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 14, 2026, 10:53 AM EDT
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 14, 2026, 10:53 AM EDT
Not yet recruiting Phase 1 Interventional

Vaginal Sildenafil for Primary Dysmenorrhea

NCT07508358
View directory record Official record
Conditions
Dysmenorrhea, Menstrual Pain, Endometriosis, Uterine Fibroid
Interventions
Sildenafil citrate vaginal suppository
Drug
Lead sponsor
Kevin Hellman
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Evanston, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 25, 2026 · Synced Oct 14, 2026, 10:53 AM EDT
Completed Phase 4 Interventional

A Multicenter, Randomized, Parallel Group, Double-Blind, Placebo Controlled, Flexible Dose Escalation Study To Evaluate Sexual And Relationship Satisfaction In The Female Partner Of Men With Erectile Dysfunction Treated With Sildenafil Citrate

NCT00644631
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
sildenafil, placebo
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
21 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2004
U.S. locations
31
States / cities
Huntsville, Alabama • Little Rock, Arkansas • Beverly Hills, California + 26 more
Source: ClinicalTrials.gov public record
Updated Feb 1, 2021 · Synced Oct 14, 2026, 10:53 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Smoking Cessation and Functional CT Assessment

NCT03382106
View directory record Official record
Conditions
Emphysema
Interventions
Sildenafil 20 MG, Placebo Oral Tablet, Pulse wave velocity, Carotid artery compliance and stiffness, Pressure wave reflection
Drug · Diagnostic Test
Lead sponsor
Eric A. Hoffman
Other
Eligibility
21 Years to 65 Years
Enrollment
162 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2024
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Feb 14, 2025 · Synced Oct 14, 2026, 10:53 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Lybrido for Female Sexual Dysfunction

NCT01432665
View directory record Official record
Conditions
Hypoactive Sexual Desire Disorder
Interventions
Placebo, Sildenafil, Testosterone
Drug
Lead sponsor
Emotional Brain NY Inc.
Industry
Eligibility
21 Years to 70 Years · Female only
Enrollment
196 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2011
U.S. locations
14
States / cities
San Diego, California • Washington D.C., District of Columbia • Brooksville, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Jul 29, 2013 · Synced Oct 14, 2026, 10:53 AM 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 14, 2026, 10:53 AM EDT
Completed Phase 4 Interventional Results available

Study of Effects of Sildenafil on Patients With Fontan Heart Circulation

NCT01815502
View directory record Official record
Conditions
Single Ventricle Heart Disease After Fontan Surgery
Interventions
Cardiac catheterization
Diagnostic Test
Lead sponsor
Medical University of South Carolina
Other
Eligibility
3 Years to 40 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Dec 7, 2018 · Synced Oct 14, 2026, 10:53 AM EDT
Withdrawn Phase 4 Interventional

Pulmonary Hypertension Secondary to Idiopathic Pulmonary Fibrosis And Treatment With Sildenafil

NCT00625079
View directory record Official record
Conditions
Pulmonary Arterial Hypertension, Idiopathic Pulmonary Fibrosis, Interstitial Lung Disease, Pulmonary Hypertension
Interventions
sildenafil
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
Not listed
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 1, 2018 · Synced Oct 14, 2026, 10:53 AM 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 14, 2026, 10:53 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Sildenafil Exercise: Role of PDE5 Inhibition

NCT04039087
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Sildenafil 40mg oral capsule, Placebo Oral capsule
Drug
Lead sponsor
National Jewish Health
Other
Eligibility
9 Years and older
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
2
States / cities
Denver, Colorado • Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 28, 2026 · Synced Oct 14, 2026, 10:53 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 24, 2010 · Synced Oct 14, 2026, 10:53 AM EDT