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Showing 1–24 of 47 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Oral Treprostinil Clear all
Withdrawn Phase 2 Interventional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 2, 2026, 6:50 PM EDT
Recruiting Phase 3 Interventional

A Phase 3 Study to Evaluate the Safety and Efficacy L606 in Participants With PH-ILD

NCT07285655
View directory record Official record
Conditions
Pulmonary Hypertension Due to Lung Disease (Disorder)
Interventions
L606, Placebo
Drug
Lead sponsor
Liquidia Technologies, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
344 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
12
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Los Angeles, California + 9 more
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Sep 2, 2026, 6:50 PM EDT
Completed Phase 4 Interventional Results available

Safety Evaluation of Inhaled Treprostinil Administration Following Transition From Inhaled Ventavis in Pulmonary Arterial Hypertension (PAH) Subjects

NCT00741819
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Inhaled treprostinil
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 75 Years
Enrollment
73 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
15
States / cities
Birmingham, Alabama • La Jolla, California • Los Angeles, California + 9 more
Source: ClinicalTrials.gov public record
Updated Feb 19, 2013 · Synced Sep 2, 2026, 6:50 PM EDT
Completed Phase 3 Interventional Results available

FREEDOM - M: Oral Treprostinil as Monotherapy for the Treatment of Pulmonary Arterial Hypertension (PAH)

NCT00325403
View directory record Official record
Conditions
Pulmonary Hypertension
Interventions
Oral treprostinil (UT-15C) Sustained Release Tablets, Placebo
Drug · Other
Lead sponsor
United Therapeutics
Industry
Eligibility
12 Years to 75 Years
Enrollment
349 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
43
States / cities
Birmingham, Alabama • Phoenix, Arizona • Fresno, California + 34 more
Source: ClinicalTrials.gov public record
Updated Jan 2, 2024 · Synced Sep 2, 2026, 6:50 PM EDT
Recruiting Phase 3 Interventional

Efficacy and Safety Study of Treprostinil Palmitil Inhalation Powder (TPIP) in Participants With Pulmonary Hypertension Associated With Interstitial Lung Disease (PH-ILD)

NCT07179380
View directory record Official record
Conditions
Pulmonary Hypertension, Interstitial Lung Disease
Interventions
Treprostinil Palmitil Inhalation Powder, Placebo
Drug
Lead sponsor
Insmed Incorporated
Industry
Eligibility
18 Years and older
Enrollment
344 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
11
States / cities
Los Angeles, California • Santa Barbara, California • Gainesville, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Sep 2, 2026, 6:50 PM 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 2, 2026, 6:50 PM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety of Oral UT-15C Tablets to Treat Pulmonary Arterial Hypertension

NCT00887978
View directory record Official record
Conditions
Pulmonary Hypertension
Interventions
UT-15C SR, Placebo
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 75 Years
Enrollment
310 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
40
States / cities
Birmingham, Alabama • Phoenix, Arizona • Fresno, California + 33 more
Source: ClinicalTrials.gov public record
Updated Jan 14, 2013 · Synced Sep 2, 2026, 6:50 PM EDT
Withdrawn Phase 2 Interventional

Telemonitoring to Treat Group 2 Pulmonary Hypertension

NCT04882774
View directory record Official record
Conditions
Pulmonary Hypertension Due to Left Heart Disease
Interventions
Treprostinil Diolamine
Drug
Lead sponsor
Mardi Gomberg -Maitland MD, MSc
Other
Eligibility
18 Years to 85 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
3
States / cities
Washington D.C., District of Columbia • Columbus, Ohio • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 5, 2023 · Synced Sep 2, 2026, 6:50 PM EDT
Completed Phase 3 Interventional Results available

An Open-Label, Long-Term Study of Oral Treprostinil in Subjects With Pulmonary Arterial Hypertension

NCT01560637
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
UT-15C (treprostinil diolamine)
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 75 Years
Enrollment
471 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2021
U.S. locations
38
States / cities
Phoenix, Arizona • Tucson, Arizona • Fresno, California + 33 more
Source: ClinicalTrials.gov public record
Updated Jun 1, 2022 · Synced Sep 2, 2026, 6:50 PM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

A Study to Evaluate the Pharmacokinetics (PK) and Safety of a Single Dose of Treprostinil Palmitil Inhalation Powder (TPIP) in Participants With Normal Hepatic Function and Participants With Hepatic Impairment

NCT07643155
View directory record Official record
Conditions
Hepatic Impairment
Interventions
Treprostinil Palmitil Inhalation Powder
Drug
Lead sponsor
Insmed Incorporated
Industry
Eligibility
18 Years to 70 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
2
States / cities
Lake Forest, California • Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Aug 10, 2026 · Synced Sep 2, 2026, 6:50 PM 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 2, 2026, 6:50 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Food on the Pharmacokinetics of Oral Treprostinil

NCT00963001
View directory record Official record
Conditions
Hypertension, Pulmonary, Pulmonary Arterial Hypertension
Interventions
Treprostinil diethanolamine, Standardized meals
Drug · Other
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 55 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Mar 7, 2010 · Synced Sep 2, 2026, 6:50 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pharmacokinetic Linearity and Comparative Bioavailability of Treprostinil Diethanolamine

NCT01153386
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
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Aug 22, 2010 · Synced Sep 2, 2026, 6:50 PM 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 2, 2026, 6:50 PM EDT
Completed Phase 4 Interventional Results available

EXPEDITE: A Study of Remodulin Induction Followed by Orenitram Optimization to Treat Pulmonary Arterial Hypertension

NCT03497689
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Intravenous/Subcutaneous Treprostinil; Oral Treprostinil
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 75 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
11
States / cities
Fresno, California • Torrance, California • Orlando, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Aug 6, 2023 · Synced Sep 2, 2026, 6:50 PM EDT
Terminated Phase 3 Interventional Results available

Oral Treprostinil in Subjects With Pulmonary Hypertension Associated With Heart Failure With Preserved Ejection Fraction

NCT03037580
View directory record Official record
Conditions
Pulmonary Hypertension, Heart Failure With Preserved Ejection Fraction
Interventions
Oral treprostinil, Placebo
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 85 Years
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
82
States / cities
Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 66 more
Source: ClinicalTrials.gov public record
Updated Nov 9, 2020 · Synced Sep 2, 2026, 6:50 PM EDT
Terminated Phase 3 Interventional Results available

Open-label Extension of Oral Treprostinil in Subjects With PH Associated With HFpEF

NCT03043651
View directory record Official record
Conditions
Pulmonary Hypertension Associated With HFpEF
Interventions
Oral treprostinil
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 85 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
82
States / cities
Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 66 more
Source: ClinicalTrials.gov public record
Updated Oct 21, 2020 · Synced Sep 2, 2026, 6:50 PM EDT
Terminated Phase 2 Interventional Results available

Open-Label Study of Oral Treprostinil in Digital Ulcers

NCT00848107
View directory record Official record
Conditions
Systemic Sclerosis
Interventions
treprostinil diethanolamine
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
115 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
22
States / cities
Birmingham, Alabama • Scottsdale, Arizona • Los Angeles, California + 19 more
Source: ClinicalTrials.gov public record
Updated Jun 17, 2024 · Synced Sep 2, 2026, 6:50 PM 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 2, 2026, 6:50 PM 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 2, 2026, 6:50 PM EDT
Active, not recruiting No phase listed Observational

ADAPT - A Patient Registry of the Real-world Use of Orenitram®

NCT03045029
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Oral treprostinil
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2027
U.S. locations
41
States / cities
Fresno, California • Los Angeles, California • San Juan Capistrano, California + 37 more
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced Sep 2, 2026, 6:50 PM EDT
Not yet recruiting Phase 4 Interventional

A Study of Inhaled Treprostinil (LIQ861) in Adults With Pulmonary Arterial Hypertension Transitioning From Oral Selexipag

NCT07759804
View directory record Official record
Conditions
Pulmonary Arterial Hypertension (PAH)
Interventions
LIQ861 (treprostinil) inhalation powder
Combination Product
Lead sponsor
Liquidia Technologies, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Columbus, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 2, 2026, 6:50 PM EDT
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 2, 2026, 6:50 PM EDT
Completed Phase 2 Interventional Results available

Safety, Tolerability, and Pharmacokinetics of Oral Treprostinil in Pediatric PAH Patients Aged 7 to 17 Years

NCT02276872
View directory record Official record
Conditions
PAH
Interventions
oral treprostinil
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
7 Years to 17 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
9
States / cities
Palo Alto, California • San Francisco, California • Aurora, Colorado + 6 more
Source: ClinicalTrials.gov public record
Updated Mar 29, 2025 · Synced Sep 2, 2026, 6:50 PM EDT