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ClinicalTrials.gov public records Last synced Sep 28, 2026, 10:54 AM EDT

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Showing 25–39 of 15 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Endothelin Receptor Antagonists Clear all
Withdrawn Phase 3 Interventional

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

NCT00760916
View directory record Official record
Conditions
Pulmonary Hypertension
Interventions
UT-15C 1 mg, UT-15C 0.25 mg, UT-15C 5 mg, Placebo
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 70 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
26
States / cities
Birmingham, Alabama • Los Angeles, California • Sacramento, California + 19 more
Source: ClinicalTrials.gov public record
Updated Jan 29, 2013 · Synced Sep 28, 2026, 10:54 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 28, 2026, 10:54 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 28, 2026, 10:54 AM EDT
Active, not recruiting Phase 2 Interventional

A Clinical Study of Sotatercept (MK-7962) in People With Pulmonary Arterial Hypertension (MK-7962-031/LIGHTRAY EXTENSION)

NCT06925750
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Sotatercept, Background PAH Therapy
Biological · Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
3
States / cities
Aurora, Colorado • Kansas City, Kansas • Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Dec 4, 2025 · Synced Sep 28, 2026, 10:54 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 28, 2026, 10:54 AM EDT
Active, not recruiting Phase 3 Interventional

Outcome Study Assessing a 75 Milligrams (mg) Dose of Macitentan in Patients With Pulmonary Arterial Hypertension

NCT04273945
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Macitentan 10 mg, Macitentan 37.5 mg, Macitentan 75 mg, Placebo
Drug
Lead sponsor
Actelion
Industry
Eligibility
18 Years and older
Enrollment
935 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2029
U.S. locations
43
States / cities
Phoenix, Arizona • Scottsdale, Arizona • La Jolla, California + 35 more
Source: ClinicalTrials.gov public record
Updated Sep 24, 2026 · Synced Sep 28, 2026, 10:54 AM EDT
Completed Phase 3 Interventional Results available

A Study of Sotatercept for the Treatment of Pulmonary Arterial Hypertension (MK-7962-003/A011-11)(STELLAR)

NCT04576988
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Sotatercept, Placebo, Background PAH Therapy
Biological · Drug
Lead sponsor
Acceleron Pharma, Inc., a wholly-owned subsidiary of Merck & Co., Inc., Rahway, NJ USA
Industry
Eligibility
18 Years and older
Enrollment
324 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
39
States / cities
Phoenix, Arizona • Tucson, Arizona • San Diego, California + 32 more
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Sep 28, 2026, 10:54 AM EDT
Terminated Phase 3 Interventional Results available

A Open Label Study to Assess the Long-term Safety, Tolerability and Efficacy of Ambrisentan in Subjects With Inoperable Chronic Thromboembolic Pulmonary Hypertension (CTEPH)

NCT01894022
View directory record Official record
Conditions
Hypertension
Interventions
Ambrisentan 5 mg
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 80 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
2
States / cities
Boston, Massachusetts • Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Sep 10, 2017 · Synced Sep 28, 2026, 10:54 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 28, 2026, 10:54 AM EDT
Completed Phase 4 Interventional Results available

Riociguat rEplacing PDE-5i Therapy evaLuated Against Continued PDE-5i thErapy

NCT02891850
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Riociguat (Adempas, BAY63-2521), Sildenafil, Tadalafil
Drug
Lead sponsor
Bayer
Industry
Eligibility
18 Years to 75 Years
Enrollment
225 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
17
States / cities
Phoenix, Arizona • Tucson, Arizona • Sacramento, California + 14 more
Source: ClinicalTrials.gov public record
Updated Feb 25, 2021 · Synced Sep 28, 2026, 10:54 AM EDT
Terminated Phase 3 Interventional Results available

Study Looking at Combination Therapy (Sitaxsentan+Sildenafil) Vs. Monotherapy (Sitaxsentan Alone) SR-PAAS -Sitaxsentan Efficacy And Safety Trial With A Randomized Prospective Assessment Of Adding Sildenafil

NCT00796666
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
131 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
12
States / cities
Fountain Valley, California • Gainesville, Florida • Weston, Florida + 9 more
Source: ClinicalTrials.gov public record
Updated Mar 23, 2015 · Synced Sep 28, 2026, 10:54 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 28, 2026, 10:54 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 28, 2026, 10:54 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 28, 2026, 10:54 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 28, 2026, 10:54 AM EDT