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ClinicalTrials.gov public records Last synced Sep 16, 2026, 12:34 AM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: UT-15C Clear all
Completed Phase 2 Interventional Results available

Safety and Efficacy of Oral Treprostinil in the Treatment of Calcinosis in Patients With Systemic Sclerosis

NCT02663895
View directory record Official record
Conditions
Systemic Sclerosis, Calcinosis
Interventions
Oral treprostinil
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Jun 9, 2021 · Synced Sep 16, 2026, 12:34 AM EDT
Terminated Phase 2 Interventional Results available

Remodulin as Add-on Therapy for the Treatment of Persistent Pulmonary Hypertension of the Newborn

NCT02261883
View directory record Official record
Conditions
Persistent Pulmonary Hypertension of the Newborn
Interventions
IV Remodulin, Placebo
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
1 Hour to 14 Days
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2023
U.S. locations
14
States / cities
Little Rock, Arkansas • Los Angeles, California • Palo Alto, California + 11 more
Source: ClinicalTrials.gov public record
Updated Mar 4, 2024 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Phase 2 Interventional Results available

Remodulin® to Oral Treprostinil Transition

NCT01588405
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
UT-15C SR
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
15 Years to 80 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
6
States / cities
Phoenix, Arizona • Tucson, Arizona • St Louis, Missouri + 3 more
Source: ClinicalTrials.gov public record
Updated May 15, 2016 · Synced Sep 16, 2026, 12:34 AM EDT
Terminated Phase 3 Interventional

Study of Remodulin in Patients With Critical Limb Ischemia With No Planned Revascularization Procedures

NCT00060996
View directory record Official record
Conditions
Critical Limb Ischemia, Peripheral Vascular Disease, Foot Ulcers, Rest Leg Pain
Interventions
Remodulin® (treprostinil sodium) Injection
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 85 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2004
U.S. locations
7
States / cities
Tampa, Florida • Worcester, Massachusetts • Minneapolis, Minnesota + 4 more
Source: ClinicalTrials.gov public record
Updated Mar 6, 2013 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Safety and Efficacy of Inhaled Treprostinil in Adult PH With ILD Including CPFE

NCT02630316
View directory record Official record
Conditions
Pulmonary Hypertension, Interstitial Lung Disease, Combined Pulmonary Fibrosis and Emphysema
Interventions
Inhaled Treprostinil, Placebo
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
326 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
96
States / cities
Birmingham, Alabama • Mobile, Alabama • Phoenix, Arizona + 71 more
Source: ClinicalTrials.gov public record
Updated Jul 26, 2022 · Synced Sep 16, 2026, 12:34 AM EDT
Withdrawn Phase 2 Interventional

Oral Treprostinil in Subjects With Pulmonary Hypertension Associated With Pulmonary Fibrosis

NCT02603068
View directory record Official record
Conditions
Pulmonary Hypertension, Pulmonary Fibrosis
Interventions
Oral treprostinil
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 79 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
7
States / cities
Phoenix, Arizona • Los Angeles, California • Sacramento, California + 4 more
Source: ClinicalTrials.gov public record
Updated Feb 8, 2016 · Synced Sep 16, 2026, 12:34 AM EDT
Active, not recruiting Not applicable Interventional Results available

DelIVery for Pulmonary Arterial Hypertension (PAH) & Continued Support Study

NCT01321073
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Model 10642 Implantable Intravascular Catheter
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
64 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2032
U.S. locations
8
States / cities
Birmingham, Alabama • Los Angeles, California • Orlando, Florida + 5 more
Source: ClinicalTrials.gov public record
Updated Jan 25, 2026 · Synced Sep 16, 2026, 12:34 AM EDT
Completed No phase listed Observational

Tyvaso Dosing and Titration Evaluation: TyTRATE Registry

NCT01799473
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Not listed
Lead sponsor
United Therapeutics
Industry
Eligibility
Not listed
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
51
States / cities
La Jolla, California • Los Angeles, California • Pasadena, California + 45 more
Source: ClinicalTrials.gov public record
Updated Mar 23, 2015 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Bioavailability Study Comparing Treprostinil Diethanolamine Oral Tablets and Oral Solution in Healthy Volunteers

NCT01172496
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
treprostinil diethanolamine
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 55 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2010
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Oct 12, 2010 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Early Phase 1 Interventional

Assess Efficacy of of Oral Treprostinil in Patients With Symptomatic Primary or Secondary Raynaud's Phenomenon

NCT02583789
View directory record Official record
Conditions
Raynaud's Phenomenon
Interventions
oral treprostinil, Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 9, 2022 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Phase 2 Interventional Results available

Digital Ischemic Lesions in Scleroderma Treated With Oral Treprostinil Diethanolamine

NCT00775463
View directory record Official record
Conditions
Systemic Sclerosis, Scleroderma
Interventions
treprostinil diethanolamine, placebo
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
148 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
24
States / cities
Birmingham, Alabama • Scottsdale, Arizona • Los Angeles, California + 21 more
Source: ClinicalTrials.gov public record
Updated Dec 27, 2023 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Phase 4 Interventional

A Transition Study From Flolan® to Remodulin® in Patients With Pulmonary Arterial Hypertension

NCT00058929
View directory record Official record
Conditions
Pulmonary Arterial Hypertension, Pulmonary Hypertension
Interventions
treprostinil sodium
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 75 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2005
U.S. locations
8
States / cities
Los Angeles, California • Torrance, California • Chicago, Illinois + 5 more
Source: ClinicalTrials.gov public record
Updated Mar 6, 2013 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Phase 3 Interventional Results available

A Pharmacokinetic Substudy of the TDE-PH-304 Protocol

NCT01934582
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
UT-15C SR, treprostinil diethanolamine
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
12 Years to 75 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jan 2, 2024 · Synced Sep 16, 2026, 12:34 AM EDT
Active, not recruiting Phase 4 Interventional

A Study of a Mean Pulmonary Artery Pressure-Targeted Approach With Early and Rapid Treprostinil Therapy to Reverse Right Ventricular Remodeling in Participants With Pulmonary Arterial Hypertension

NCT05203510
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Parenteral Treprostinil, Oral Treprostinil
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
28
States / cities
Phoenix, Arizona • Fresno, California • Los Angeles, California + 23 more
Source: ClinicalTrials.gov public record
Updated Dec 8, 2025 · Synced Sep 16, 2026, 12:34 AM EDT
Completed No phase listed Observational

Pharmacokinetic Study of Sub-q and IV Treprostinil in Kids With Pulmonary Arterial Hypertension (PAH)

NCT02318186
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Not listed
Lead sponsor
Jeffrey A. Feinstein
Other
Eligibility
Up to 18 Years
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Oct 4, 2017 · Synced Sep 16, 2026, 12:34 AM EDT
Terminated Phase 3 Interventional Results available

A Phase 3 Adaptive Study to Evaluate the Safety and Efficacy of Inhaled Treprostinil in Participants With Pulmonary Hypertension (PH) Due to Chronic Obstructive Pulmonary Disease (COPD)

NCT03496623
View directory record Official record
Conditions
Pulmonary Hypertension, Chronic Obstructive Pulmonary Disease
Interventions
Inhaled treprostinil solution, Placebo solution
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
188 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
65
States / cities
Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 53 more
Source: ClinicalTrials.gov public record
Updated Nov 23, 2023 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Phase 3 Interventional

Study of Efficacy and Safety of Inhaled Treprostinil in Subjects With Idiopathic Pulmonary Fibrosis

NCT04708782
View directory record Official record
Conditions
Idiopathic Pulmonary Fibrosis, Interstitial Lung Disease
Interventions
Placebo, Inhaled Treprostinil, Treprostinil Ultrasonic Nebulizer
Drug · Device
Lead sponsor
United Therapeutics
Industry
Eligibility
40 Years and older
Enrollment
598 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
90
States / cities
Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 73 more
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Comparative Bioavailability of Treprostinil Diethanolamine Manufactured by Two Independent Facilities

NCT01165476
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Treprostinil diethanolamine
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 55 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Apr 18, 2011 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Phase 3 Interventional

Phase III Randomized Study of UT-15 in Patients With Primary Pulmonary Hypertension

NCT00004497
View directory record Official record
Conditions
Pulmonary Hypertension
Interventions
UT-15
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
8 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2000
U.S. locations
7
States / cities
Torrance, California • Chicago, Illinois • Baltimore, Maryland + 4 more
Source: ClinicalTrials.gov public record
Updated Mar 24, 2015 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Phase 4 Interventional Results available

Safety, Efficacy and Treatment Satisfaction in Patients With PAH Rapidly Switched From Epoprostenol to Remodulin

NCT00373360
View directory record Official record
Conditions
Pulmonary Hypertension
Interventions
treprostinil sodium
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 70 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 6, 2013 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Phase 2 Interventional Results available

A Dose Response Study of UT-15C SR in Patients With Exercise-Induced Pulmonary Hypertension

NCT01104870
View directory record Official record
Conditions
Pulmonary Hypertension
Interventions
UT-15C
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
9
States / cities
Phoenix, Arizona • Tucson, Arizona • Los Angeles, California + 5 more
Source: ClinicalTrials.gov public record
Updated May 26, 2016 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pharmacokinetic Interaction of Oral Treprostinil and Ethanol in Healthy Volunteers

NCT02318758
View directory record Official record
Conditions
Healthy
Interventions
UT-15C, ethanol
Drug · Other
Lead sponsor
United Therapeutics
Industry
Eligibility
21 Years to 55 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Mar 23, 2015 · Synced Sep 16, 2026, 12:34 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Three Times Daily Dosing of UT-15C

NCT01746485
View directory record Official record
Conditions
Healthy
Interventions
UT-15C
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 55 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Dec 11, 2012 · Synced Sep 16, 2026, 12:34 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 16, 2026, 12:34 AM EDT