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 are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.

Clear filters
ClinicalTrials.gov public records Last synced Sep 3, 2026, 5:28 AM 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 39 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Intervention: Endothelin Receptor Antagonists Clear all
Terminated Phase 3 Interventional Results available

Ambrisentan for Inoperable Chronic Thromboembolic Pulmonary Hypertension.

NCT01884675
View directory record Official record
Conditions
Hypertension
Interventions
Ambrisentan 5 mg, Placebo
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 80 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
2
States / cities
Boston, Massachusetts • Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 5, 2017 · Synced Sep 3, 2026, 5:28 AM EDT
Completed Phase 2 Interventional Results available

A Study of Sotatercept for the Treatment of Pulmonary Arterial Hypertension (PAH)

NCT03496207
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Placebo, Sotatercept, SOC
Drug · Other
Lead sponsor
Acceleron Pharma, Inc., a wholly-owned subsidiary of Merck & Co., Inc., Rahway, NJ USA
Industry
Eligibility
18 Years and older
Enrollment
106 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
12
States / cities
Phoenix, Arizona • Tucson, Arizona • San Francisco, California + 7 more
Source: ClinicalTrials.gov public record
Updated Apr 18, 2023 · Synced Sep 3, 2026, 5:28 AM EDT
Completed No phase listed Observational

Changes in Eye Pressure and Anterior Chamber Depth With Oral Endothelin Antagonist Therapy

NCT00452283
View directory record Official record
Conditions
Glaucoma, Pulmonary Hypertension
Interventions
Not listed
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 80 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 30, 2013 · Synced Sep 3, 2026, 5:28 AM EDT
Completed Phase 2 Interventional

A Prospective, Double-Blind, Placebo-Controlled, Multicenter Study to Evaluate Efficacy and Safety of Atrasentan, Including Thoracic Bioimpedance, in Type 2 Diabetic Subjects With Nephropathy

NCT01399580
View directory record Official record
Conditions
Chronic Kidney Disease, Diabetic Nephropathy
Interventions
Atrasentan, Placebo
Drug
Lead sponsor
AbbVie (prior sponsor, Abbott)
Industry
Eligibility
18 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
28
States / cities
Phoenix, Arizona • Tempe, Arizona • Azusa, California + 23 more
Source: ClinicalTrials.gov public record
Updated Oct 24, 2013 · Synced Sep 3, 2026, 5:28 AM 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 3, 2026, 5:28 AM EDT
Completed Phase 2 Interventional Results available

A Trial to Evaluate the Safety and Efficacy of PS433540 to Treat Hypertension

NCT00522925
View directory record Official record
Conditions
Hypertension
Interventions
PS433540, placebo
Drug
Lead sponsor
Ligand Pharmaceuticals
Industry
Eligibility
30 Years to 80 Years
Enrollment
280 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
15
States / cities
Tempe, Arizona • Lincoln, California • Long Beach, California + 12 more
Source: ClinicalTrials.gov public record
Updated Sep 15, 2011 · Synced Sep 3, 2026, 5:28 AM EDT
Completed Phase 4 Interventional Results available

Endothelin-1 and Cardiac Allograft Vasculopathy (CAV)

NCT05373108
View directory record Official record
Conditions
Cardiac Allograft Vasculopathy
Interventions
Macitentan
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 11, 2024 · Synced Sep 3, 2026, 5:28 AM EDT
Active, not recruiting Phase 3 Interventional

Study to Investigate Efficacy, Safety, and Tolerability of Zibotentan/Dapagliflozin Compared to Dapagliflozin in Participants With Chronic Kidney Disease and High Proteinuria (ZENITH High Proteinuria)

NCT06087835
View directory record Official record
Conditions
Chronic Kidney Disease With High Proteinuria
Interventions
Zibotentan/Dapagliflozin, Dapagliflozin
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 95 Years
Enrollment
1,835 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
64
States / cities
Huntsville, Alabama • Sun City West, Arizona • Bakersfield, California + 55 more
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Sep 3, 2026, 5:28 AM EDT
Terminated Phase 3 Interventional Results available

ARTEMIS-PH - Study of Ambrisentan in Subjects With Pulmonary Hypertension Associated With Idiopathic Pulmonary Fibrosis

NCT00879229
View directory record Official record
Conditions
Idiopathic Pulmonary Fibrosis, Pulmonary Hypertension
Interventions
Ambrisentan, Placebo
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
35 Years to 80 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
51
States / cities
Birmingham, Alabama • Scottsdale, Arizona • Davis, California + 40 more
Source: ClinicalTrials.gov public record
Updated May 14, 2014 · Synced Sep 3, 2026, 5:28 AM EDT
Terminated Phase 3 Interventional Results available

Study Providing Monotherapy (Sitaxsentan) And Combination Therapy (Sitaxsentan+Sildenafil) To Subjects With Pulmonary Arterial Hypertension (PAH) To Assess Long-Term Safety

NCT00796510
View directory record Official record
Conditions
Pulmonary Arterial Hypertension, Pulmonary Hypertension
Interventions
Sitaxsentan, Sitaxsentan and Sildenafil
Drug
Lead sponsor
Pfizer
Industry
Eligibility
16 Years to 80 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Fountain Valley, California
Source: ClinicalTrials.gov public record
Updated Oct 24, 2018 · Synced Sep 3, 2026, 5:28 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 3, 2026, 5:28 AM EDT
Completed No phase listed Observational

Epidemiology and Treatment Patterns of Paediatric PAH (Pulmonary Arterial Hypertension)

NCT02576002
View directory record Official record
Conditions
Hypertension, Pulmonary
Interventions
Assigned pulmonary hypertension medication
Drug
Lead sponsor
Bayer
Industry
Eligibility
Up to 18 Years
Enrollment
2,691 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 25, 2016 · Synced Sep 3, 2026, 5:28 AM EDT
Completed Phase 2 Interventional Results available

A Study of Sotatercept for the Treatment of Pulmonary Arterial Hypertension

NCT03738150
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Sotatercept, SOC
Biological · Other
Lead sponsor
Acceleron Pharma, Inc., a wholly-owned subsidiary of Merck & Co., Inc., Rahway, NJ USA
Industry
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
4
States / cities
Tucson, Arizona • Boston, Massachusetts • Rochester, Minnesota + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 26, 2024 · Synced Sep 3, 2026, 5:28 AM EDT
Withdrawn No phase listed Observational

Pharmacogenomics in Pulmonary Arterial Hypertension

NCT00593905
View directory record Official record
Conditions
Pulmonary Arterial Hypertension, Pulmonary Hypertension, PAH WHO Group I
Interventions
Sitaxsentan, Bosentan, Ambrisentan
Drug
Lead sponsor
West Penn Allegheny Health System
Other
Eligibility
Not listed
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2012
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 8, 2021 · Synced Sep 3, 2026, 5:28 AM EDT
Completed Phase 3 Interventional Results available

FREEDOM-C: Oral Treprostinil in Combination With an Endothelin Receptor Antagonist (ERA) and/or a Phosphodiesterase-5 (PDE-5) Inhibitor for the Treatment of Pulmonary Arterial Hypertension (PAH)

NCT00325442
View directory record Official record
Conditions
Pulmonary Hypertension
Interventions
Oral treprostinil (UT-15C) sustained release tablets, Placebo
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
12 Years to 70 Years
Enrollment
354 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
39
States / cities
Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 31 more
Source: ClinicalTrials.gov public record
Updated Aug 1, 2017 · Synced Sep 3, 2026, 5:28 AM EDT
Completed No phase listed Observational Results available

Data Analysis for Drug Repurposing for Effective Alzheimer's Medicines (DREAM) - PDE5

NCT05039086
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
PDE5 inhibitor, Endothelin Receptor Antagonists
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
65 Years and older
Enrollment
13,021 participants
Timeline
2021 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 5, 2025 · Synced Sep 3, 2026, 5:28 AM EDT
Completed Phase 2 Interventional Results available

Zibotentan and Dapagliflozin for the Treatment of CKD (ZENITH-CKD Trial)

NCT04724837
View directory record Official record
Conditions
Chronic Kidney Disease
Interventions
Zibotentan, Dapagliflozin, Placebo
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 130 Years
Enrollment
542 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
50
States / cities
Huntsville, Alabama • Beverly Hills, California • Downey, California + 44 more
Source: ClinicalTrials.gov public record
Updated Jul 29, 2024 · Synced Sep 3, 2026, 5:28 AM EDT
Completed Phase 2 Interventional

Zibotentan, an Endothelin Receptor Antagonist, Patients With Intermittent Claudication

NCT01890135
View directory record Official record
Conditions
Peripheral Arterial Disease, Intermittent Claudication
Interventions
Zibotentan (ZD4054), placebo
Drug
Lead sponsor
University of Virginia
Other
Eligibility
40 Years and older
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 1, 2016 · Synced Sep 3, 2026, 5:28 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Mechanisms of Cerebrovascular Control

NCT02936687
View directory record Official record
Conditions
Metabolic Syndrome X
Interventions
NOS Inhibition, ET-1 Inhibition, NOS Inhibition Placebo, 3 Tesla MRI, Intravenous Catheter, Oral Glucose Tolerance Test, ET-1 Inhibition Placebo
Drug · Device · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 45 Years
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 17, 2021 · Synced Sep 3, 2026, 5:28 AM EDT
Active, not recruiting Phase 3 Interventional Results available

A Study of Selexipag as Add-On Treatment to Standard of Care in Children With Pulmonary Arterial Hypertension

NCT04175600
View directory record Official record
Conditions
Hypertension, Pulmonary
Interventions
Selexipag, Placebo, Standard of Care (SOC): Endothelin receptor antagonist, SOC: Phosphodiesterase type 5 (PDE-5) inhibitor, SOC: Soluble guanylate cyclase stimulator
Drug
Lead sponsor
Actelion
Industry
Eligibility
2 Years to 17 Years
Enrollment
138 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
13
States / cities
Phoenix, Arizona • Los Angeles, California • San Francisco, California + 10 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 3, 2026, 5:28 AM EDT
Completed Phase 2 Interventional

Evaluate the Efficacy and Safety of Once Daily Administration of Atrasentan Tablets (Low and High) Compared to Placebo in Reducing Residual Albuminuria in Type 2 Diabetic Patients With Nephropathy Who Are Treated With the Maximum Tolerated Labeled Dose of a Renin Angiotensin System (RAS) Inhibitor

NCT01356849
View directory record Official record
Conditions
Chronic Kidney Disease, Diabetic Nephropathy
Interventions
Atrasentan, Placebo
Drug
Lead sponsor
AbbVie (prior sponsor, Abbott)
Industry
Eligibility
18 Years and older
Enrollment
149 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
59
States / cities
Pell City, Alabama • Tempe, Arizona • Azusa, California + 48 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2013 · Synced Sep 3, 2026, 5:28 AM EDT
Completed Phase 3 Interventional Results available

Ambrisentan in Patients With Porto-pulmonary Hypertension A Multicenter Open Label Trial

NCT01224210
View directory record Official record
Conditions
Portopulmonary Hypertension
Interventions
Ambrisentan
Drug
Lead sponsor
Tufts Medical Center
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2020
U.S. locations
6
States / cities
La Jolla, California • Jacksonville, Florida • Boston, Massachusetts + 3 more
Source: ClinicalTrials.gov public record
Updated Jan 11, 2021 · Synced Sep 3, 2026, 5:28 AM EDT
Terminated Phase 2 Interventional

Tezosentan in Pulmonary Arterial Hypertension

NCT01077297
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Tezosentan
Drug
Lead sponsor
Idorsia Pharmaceuticals Ltd.
Industry
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
2
States / cities
St Louis, Missouri • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 8, 2018 · Synced Sep 3, 2026, 5:28 AM EDT
Completed Phase 2 Interventional

A Clinical Study of Sotatercept (MK-7962) in People With Pulmonary Arterial Hypertension (PAH) (MK-7962-024)

NCT06664801
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Sotatercept, Background PAH Therapy
Biological
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
164 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
9
States / cities
Phoenix, Arizona • Aurora, Colorado • Indianapolis, Indiana + 6 more
Source: ClinicalTrials.gov public record
Updated Dec 4, 2025 · Synced Sep 3, 2026, 5:28 AM EDT