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Showing 1–24 of 41 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Tadalafil 20 mg Clear all
Completed Phase 3 Interventional

To Determine Effect and Safety of Tadalafil Taken by Men of Different Races and With Different Diseases When Needed for Erections

NCT00547417
View directory record Official record
Conditions
Impotence
Interventions
tadalafil
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older · Male only
Enrollment
1,933 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2004
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Oct 21, 2007 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 2 Interventional Results available

A Trial of Tadalafil in Patients With Squamous Cell Carcinoma of the Upper Aero Digestive Tract

NCT00894413
View directory record Official record
Conditions
Head and Neck Squamous Cell Carcinoma
Interventions
Tadalafil, Placebo Pill
Drug · Other
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years to 99 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 10, 2019 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 2 Interventional Results available

Effects of Tadalafil Once a Day for 12 Weeks in Men With Signs and Symptoms of Benign Prostatic Hyperplasia

NCT00386009
View directory record Official record
Conditions
Benign Prostatic Hyperplasia
Interventions
Tadalafil, Placebo
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
40 Years and older · Male only
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
8
States / cities
Newport Beach, California • Tarzana, California • Middlebury, Connecticut + 5 more
Source: ClinicalTrials.gov public record
Updated Jul 8, 2009 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 4 Interventional Results available

A Clinical Trial of Ambrisentan and Tadalafil in Pulmonary Arterial Hypertension Associated With Systemic Sclerosis

NCT01042158
View directory record Official record
Conditions
Pulmonary Arterial Hypertension, Systemic Sclerosis, Scleroderma Spectrum of Diseases, Connective Tissue Disease, Pulmonary Hypertension
Interventions
tadalafil and ambrisentan upfront combination therapy
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 11, 2017 · Synced Sep 25, 2026, 3:04 PM EDT
Active, not recruiting Phase 2 Interventional

Tadalafil Effect + Chemotherapy in Resectable Gastric/GEJ Cancer

NCT05709574
View directory record Official record
Conditions
Gastric Adenocarcinoma, Gastroesophageal Junction Adenocarcinoma
Interventions
Tadalafil 20 MG
Drug
Lead sponsor
University of Arizona
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 1, 2026 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 2 Interventional Results available

Study of CRS-207, Pembrolizumab, Ipilimumab, and Tadalafil in Metastatic Pancreatic Cancer

NCT05014776
View directory record Official record
Conditions
Pancreatic Cancer
Interventions
Tadalafil, Pembrolizumab, Ipilimumab, CRS-207
Drug
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 27, 2026 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

A Study of LY2623091 in Healthy Participants

NCT02300259
View directory record Official record
Conditions
Healthy Volunteers
Interventions
LY2623091, Itraconazole, Simvastatin, Tadalafil, Diltiazem
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years to 65 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Daytona Beach, Florida
Source: ClinicalTrials.gov public record
Updated Jun 25, 2020 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 1 Interventional

PDE5 Inhibition Via Tadalafil to Enhance Anti-Tumor Mucin 1 (MUC1) Vaccine Efficacy in Patients With HNSCC

NCT02544880
View directory record Official record
Conditions
Head and Neck Squamous Cell Carcinoma, Head and Neck Cancer
Interventions
Tadalafil, Anti-MUC1 Vaccine, Anti-Influenza Vaccine, Tadalafil Placebo, Anti-MUC1 Vaccine Placebo, Standard of Care Treatment, Anti-Influenza Vaccine Placebo
Drug · Biological · Other
Lead sponsor
Donald T. Weed, MD, FACS
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jun 14, 2021 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Study of Tadalafil Once-a Day for 12 Weeks in Men With Signs and Symptoms of Benign Prostatic Hyperplasia

NCT00384930
View directory record Official record
Conditions
Benign Prostatic Hyperplasia
Interventions
tadalafil, placebo
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
45 Years and older · Male only
Enrollment
1,058 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Greenwood, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 1, 2009 · Synced Sep 25, 2026, 3:04 PM EDT
Terminated Early Phase 1 Interventional Accepts healthy volunteers

The Study of Skeletal Muscle Blood Flow in Becker Muscular Dystrophy

NCT02653833
View directory record Official record
Conditions
Muscular Dystrophy
Interventions
Tadalafil 20 MG, beetroot juice extract
Drug · Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years to 45 Years · Male only
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 13, 2020 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 1Phase 2 Interventional Results available

A Pharmacokinetics Study for Pediatric Participants With Pulmonary Arterial Hypertension

NCT01484431
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Tadalafil- Tablet or Oral suspension
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
6 Months to 17 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2019
U.S. locations
5
States / cities
Aurora, Colorado • Atlanta, Georgia • Indianapolis, Indiana + 2 more
Source: ClinicalTrials.gov public record
Updated Oct 8, 2019 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Tadalafil in Becker Muscular Dystrophy

NCT01070511
View directory record Official record
Conditions
Becker Muscular Dystrophy
Interventions
Tadalafil, Placebo
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years to 55 Years · Male only
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
2
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 19, 2013 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 3 Interventional

To Determine How Different Doses of Tadalafil Work on Getting and Keeping an Erection 26 or 36 Hours After Taking

NCT00547508
View directory record Official record
Conditions
Impotence
Interventions
tadalafil, placebo
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older · Male only
Enrollment
485 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2003
U.S. locations
1
States / cities
Knoxville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 21, 2007 · Synced Sep 25, 2026, 3:04 PM EDT
Withdrawn Phase 3 Interventional

Phosphodiesterase Type 5 Inhibition With Tadalafil Changes Outcomes in Heart Failure: Extent of Renal Damage

NCT01960153
View directory record Official record
Conditions
Heart Failure, Pulmonary Hypertension
Interventions
Tadalafil, Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
21 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 11, 2017 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 2 Interventional Results available

A Study of LY2623091 in Participants With High Blood Pressure

NCT02194465
View directory record Official record
Conditions
Primary Hypertension
Interventions
LY2623091, Tadalafil, Spironolactone, Placebo
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years to 80 Years
Enrollment
304 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
33
States / cities
Glendale, Arizona • Concord, California • Encinitas, California + 28 more
Source: ClinicalTrials.gov public record
Updated Jun 25, 2020 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Study to Determine How Cialis Effects the Renal Function in Response to Volume Expansion in Preclinical Systolic Cardiomyopathy (Aim2)

NCT01970176
View directory record Official record
Conditions
Cardiomyopathy, Renal Impairment
Interventions
Tadalafil, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
21 Years to 90 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 10, 2021 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

A Study of Semen Characteristics After 9 Months of Daily Tadalafil 20 mg

NCT00382135
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
tadalafil, placebo
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
45 Years and older · Male only
Enrollment
282 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2005
U.S. locations
1
States / cities
Bothell, Washington
Source: ClinicalTrials.gov public record
Updated Oct 24, 2007 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Effect of PDE5 Inhibition on Adipose Metabolism in Humans

NCT04684589
View directory record Official record
Conditions
Obesity
Interventions
Tadalafil 20 MG, Placebo
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
19 Years to 50 Years
Enrollment
99 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 3 Interventional Results available

A Study of Tadalafil in Pediatric Participants With Pulmonary Arterial Hypertension (PAH)

NCT01824290
View directory record Official record
Conditions
Hypertension, Pulmonary
Interventions
Tadalafil, Placebo, ERA as specific PAH treatment
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
6 Months to 17 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2021
U.S. locations
7
States / cities
Atlanta, Georgia • Detroit, Michigan • Cincinnati, Ohio + 4 more
Source: ClinicalTrials.gov public record
Updated Nov 4, 2021 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Study to Determine How Cialis Effects the Renal Function in Response to Volume Expansion in Preclinical Diastolic Cardiomyopathy (Aim3)

NCT02058095
View directory record Official record
Conditions
Cardiomyopathy, Renal Impairment
Interventions
Tadalafil, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
21 Years to 90 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 27, 2020 · Synced Sep 25, 2026, 3:04 PM EDT
Recruiting Phase 3 Interventional

Study of Tadalafil vs. Placebo for Improving Hemodynamics and End-Organ Dysfunction in Fontan Physiology

NCT05206955
View directory record Official record
Conditions
Fontan Palliation
Interventions
Tadalafil, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 1 Interventional

Tadalafil to Overcome Immunosuppression During Chemoradiotherapy for IDH-wildtype Grade III-IV Astrocytoma

NCT04757662
View directory record Official record
Conditions
Grade III Astrocytoma, Grade IV Astrocytoma, Astrocytoma, Grade IV, Astrocytoma, Grade III
Interventions
Tadalafil
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 12, 2023 · Synced Sep 25, 2026, 3:04 PM EDT
Terminated Phase 2 Interventional Results available

Administration of Tadalafil in Conjunction With Lenalidomide and Dexamethasone in Patients With Multiple Myeloma

NCT01374217
View directory record Official record
Conditions
Multiple Myeloma
Interventions
Tadalafil, Lenalidomide, Dexamethasone, Clarithromycin
Drug
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 9, 2018 · Synced Sep 25, 2026, 3:04 PM EDT
Completed Phase 2 Interventional

Study to Determine Safety and Effectiveness of Tadalafil on Prostate Related Sex Organ/Urinary Tract Problems

NCT00547625
View directory record Official record
Conditions
Prostatic Hyperplasia, Prostate
Interventions
tadalafil, placebo
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
45 Years and older · Male only
Enrollment
275 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2005
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 21, 2007 · Synced Sep 25, 2026, 3:04 PM EDT