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RecruitingProgressive Pulmonary FibrosisInterstitial Lung Disease

Study of the Efficacy and Safety of Inhaled Treprostinil in Subjects With Progressive Pulmonary Fibrosis (TETON-PPF)

Eligible age

18+ yrs

Accepts

All genders

Locations

27 states

Healthy volunteers

No

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About this study

Study RIN-PF-305 is designed to evaluate the safety and efficacy of inhaled treprostinil in subjects with progressive pulmonary fibrosis (PPF) over a 52-week period.

Sponsor: United Therapeutics

You may qualify if…

  • 1. Subject gives voluntary informed consent to participate in the study.
  • 2. Subject is ≥18 years of age, inclusive, at the time of signing informed consent.
  • 3. Subject has radiological evidence of pulmonary fibrosis of \>10% extent on an HRCT scan in the previous 12 months (confirmed by central review).
  • 4. Subject has a diagnosis of PPF (other than IPF) that fulfills at least 1 of the following criteria for progression within 24 months of screening despite standard treatment of ILD, as assessed by the Investigator:
  • 1. Clinically significant decline in % predicted FVC based on ≥10% relative decline
  • 2. Marginal decline in % predicted FVC based on ≥5% to \<10% relative decline combined with worsening of respiratory symptoms
  • 3. Marginal decline in % predicted FVC based on ≥5% to \<10% relative decline combined with increasing extent of fibrotic changes on chest imaging
  • 4. Worsening of respiratory symptoms as well as increasing extent of fibrotic changes on chest imaging

You may not qualify if…

  • 1. Subject is pregnant or lactating.
  • 2. Subject has primary obstructive airway physiology (forced expiratory volume in 1 second/FVC \<0.70 at Screening) or greater extent of emphysema than fibrosis on HRCT (confirmed by central review).
  • 3. Subject has a diagnosis of IPF.
  • 4. Subject has shown intolerance or significant lack of efficacy to a prostacyclin or prostacyclin analogue that resulted in discontinuation or inability to effectively titrate that therapy.
  • 5. Subject has received any PAH-approved therapy, including prostacyclin therapy (epoprostenol, treprostinil, iloprost, or beraprost; except for acute vasoreactivity testing), IP receptor agonists (selexipag), endothelin receptor antagonists, phosphodiesterase type 5 inhibitors (PDE5-Is), soluble guanylate cyclase stimulators, or activin signaling inhibitors (sotatercept) within 60 days prior to Baseline. As needed use of a PDE5-I for erectile dysfunction is permitted, provided no doses are taken within 48 hours prior to any study-related efficacy assessments.
  • 6. Subject is receiving \>10 L/min of oxygen supplementation by any mode of delivery at rest at Baseline.
  • 7. Exacerbation of ILD or active pulmonary or upper respiratory infection within 30 days prior to Baseline. Subjects must have completed any antibiotic or steroid regimens for treatment of the infection or acute exacerbation more than 30 days prior to Baseline to be eligible. If hospitalized for an acute exacerbation of ILD or a pulmonary or upper respiratory infection, subjects must have been discharged more than 90 days prior to Baseline to be eligible.
  • 8. Subject has uncontrolled cardiac disease, defined as myocardial infarction within 6 months prior to Baseline or unstable angina within 30 days prior to Baseline.

Where it's recruiting

Alabama

Birmingham

Arizona

Phoenix

California

Los Angeles · Newport Beach · Orange · Redding

District of Columbia

Washington D.C.

Florida

Jacksonville · Tampa · Weston

Georgia

Atlanta

Illinois

Chicago · Maywood

Kansas

Kansas City

Kentucky

Lexington · Louisville

Louisiana

New Orleans

Maryland

Baltimore · Silver Spring

Massachusetts

Boston · North Dartmouth

Source: ClinicalTrials.gov · NCT05943535 · last updated 2026-07-13

Study of the Efficacy and Safety of Inhaled Treprostinil in Subjects W · TrialPath