Clinical trial No longer in our active list Phase 2 Interventional Ages 18 and up

Evaluating inhaled AP01 for progressive pulmonary fibrosis

Official title: A Randomized, Double-Blind, Placebo-Controlled, Phase 2b Study Evaluating the Safety and Efficacy of Pirfenidone Solution for Inhalation (AP01) in Participants With PPF

Run by Avalyn Pharma Inc. · NCT06329401 · Data updated 2026-05-14

This study is no longer in our active list. It may have stopped recruiting or finished. The details below are as of 2026-05-14 and are kept for reference. Check ClinicalTrials.gov for its current status, or see similar studies below.

This study is testing if inhaled AP01 can help slow down the worsening of lung disease in people with progressive pulmonary fibrosis.

More Pulmonary Fibrosis trials

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment375 (estimated)
SponsorAvalyn Pharma Inc.
Industry-sponsored
Locations152 sites (Birmingham, Alabama and 151 other locations)
Trial IDNCT06329401 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include individuals diagnosed with progressive pulmonary fibrosis who have shown evidence of disease progression despite current treatments.

Probably not a fit

Patients with idiopathic pulmonary fibrosis or those who do not meet the criteria for progressive pulmonary fibrosis may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial is a randomized, double-blind, placebo-controlled study designed to assess the safety and efficacy of inhaled AP01 (pirfenidone solution) in patients with progressive pulmonary fibrosis (PPF). Over a period of 52 weeks, up to 300 participants will be assigned to receive either a high dose, low dose of AP01, or a placebo, in addition to their standard care. The study aims to determine if inhaled AP01 can effectively slow disease progression in individuals with chronic fibrosing interstitial lung disease.

Why it matters

Potential benefit: If successful, this treatment could provide a new therapeutic option for patients suffering from progressive pulmonary fibrosis.

How similar studies have gone: Other studies have explored inhaled therapies for pulmonary fibrosis, but the specific approach of inhaled AP01 is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Participant meets criteria for PPF, as follows:
* In subjects with interstitial lung disease (ILD) of known or unknown etiology other than idiopathic pulmonary fibrosis (IPF) who have radiological evidence of pulmonary fibrosis, PPF is defined as:

Physiological evidence of disease progression with at least 1 of the following criteria despite treatment with approved or unapproved medications commonly used in practice (per Investigator):

1. Relative decline in FVC ≥10% predicted within the previous 24 months based on documented historical spirometry assessments
2. Relative decline in FVC ≥5% to \<10% predicted within the previous 24 months based on documented historical spirometry assessments with at least 1 of the 2 following criteria:

   * Worsening respiratory symptoms (Note: Changes attributable to comorbidities e.g., infection, heart failure must be excluded) OR
   * Radiological (HRCT) evidence of disease progression per a local or central radiologist (from historical HRCT taken up to 24 months prior to Screening Visit 1), for example:

     * Increased extent or severity of traction bronchiectasis and bronchiolectasis
     * New ground-glass opacity with traction bronchiectasis
     * New fine reticulation
     * Increased extent or increased coarseness of reticular abnormality
     * New or increased honeycombing
     * Increased lobar volume loss
3. Worsening of respiratory symptoms (Note: Changes attributable to comorbidities e.g., infection, heart failure must be excluded) AND radiological (HRCT) evidence of disease progression per a local or central radiologist

   * Meeting all of the following criteria during the Screening Period:

a. FVC ≥45% of predicted normal at Screening Visit 1, b. Forced expiratory volume at 1 second (FEV1)/FVC ≥0.7 or ≥age-adjusted lower limit of normal at Screening Visit 1, c. Diffusing capacity of lung for carbon monoxide (DLCO) ≥30% of predicted, corrected for hemoglobin at Screening Visit 1, d. Acceptability: Participants can perform acceptable spirometry (i.e., meet American Thoracic Society (ATS)/ European Respiratory Society (ERS) acceptability criteria at both Screening Visits).

• For subjects already on nintedanib (up to 30% of subjects): Must have been on nintedanib for at least 6 months prior to Screening with or without dose adjustments and/or drug interruptions during that period. For subjects who have discontinued nintedanib prior to Screening: Must have been off of nintedanib for a minimum of 12 weeks.

Exclusion Criteria:

* Current treatment with oral pirfenidone or treatment with oral pirfenidone within 3 months prior to Screening.
* Elevated liver enzymes and liver injury at Screening defined as:

  1. Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) ˃ 3 times the upper limit of normal (ULN)
  2. Bilirubin \>2.0 x ULN
* Renal disease with a creatinine clearance \< 30 mL/min, calculated according to the Chronic Kidney Disease Epidemiology Collaboration formula. Retesting is allowed once.
* Diagnosis of idiopathic pulmonary fibrosis (IPF) based on the ATS diagnostic algorithm for IPF. UIP that is not idiopathic, for example related to rheumatoid arthritis (RA), familial interstitial lung disease (ILD), or other is not exclusionary.
* Greater extent of emphysema than of fibrotic ILD on HRCT. Note: CT results must be confirmed through the central over read process.
* Significant clinical worsening of PPF between Screening
* Participants who cannot meet protocol-specified Baseline stability criteria. FVC Baseline stability is defined as the FVC assessments at Visit 3 being within ±12% of the mean of the FVC assessments obtained at the 2 preceding visits. At Visit 3, if the pre-dose FVC is outside of ±12% range, the participant will not be randomized and will be considered a screen failure.

Where it's running

  • University of Alabama at Birmingham
    Birmingham, Alabama, United States
    Recruiting
  • Mayo Clinic- Scottsdale
    Scottsdale, Arizona, United States
    Recruiting
  • University of Southern California
    Los Angeles, California, United States
    Recruiting
  • Cedars-Sinai
    Los Angeles, California, United States
    Recruiting
  • UCLA
    Los Angeles, California, United States
    Recruiting
  • Newport Native MD, Inc.
    Newport Beach, California, United States
    Recruiting
Show 44 more locations
  • Paradigm Clinical Research - Redding
    Redding, California, United States
    Recruiting
  • University of California - San Francisco
    San Francisco, California, United States
    Recruiting
  • University of Colorado, Anschutz Medical Campus
    Aurora, Colorado, United States
    Recruiting
  • National Jewish Health
    Denver, Colorado, United States
    Recruiting
  • UCONN Health
    Farmington, Connecticut, United States
    Recruiting
  • Yale University
    New Haven, Connecticut, United States
    Recruiting
  • Clinical Site Partners, LCC
    Leesburg, Florida, United States
    Recruiting
  • Renstar Medical Research
    Ocala, Florida, United States
    Recruiting
  • Clinical Site Partners
    Winter Park, Florida, United States
    Recruiting
  • Piedmont Healthcare, Inc.
    Atlanta, Georgia, United States
    Recruiting
  • Northwestern University
    Chicago, Illinois, United States
    Recruiting
  • Endeavor Health
    Evanston, Illinois, United States
    Recruiting
  • Loyola University Medical Center
    Maywood, Illinois, United States
    Recruiting
  • The University of Kansas Medical Center
    Kansas City, Kansas, United States
    Recruiting
  • University of Maryland
    Baltimore, Maryland, United States
    Recruiting
  • Johns Hopkins University
    Baltimore, Maryland, United States
    Recruiting
  • Beth Israel Deaconess Medical Center
    Boston, Massachusetts, United States
    Recruiting
  • University of Michigan
    Ann Arbor, Michigan, United States
    Recruiting
  • University of Minnesota
    Minneapolis, Minnesota, United States
    Recruiting
  • Mayo Clinic Rochester
    Rochester, Minnesota, United States
    Recruiting
  • Hannibal Regional Healthcare System
    Hannibal, Missouri, United States
    Recruiting
  • Northwell Health - Mount Kisco
    Mount Kisco, New York, United States
    Recruiting
  • NYU Langone Health
    New York, New York, United States
    Recruiting
  • Weill Cornell
    New York, New York, United States
    Recruiting
  • Icahn School of Medicine at Mount Sinai
    New York, New York, United States
    Recruiting
  • Columbia University
    New York, New York, United States
    Recruiting
  • Montefiore Medical Center
    The Bronx, New York, United States
    Recruiting
  • Duke University
    Durham, North Carolina, United States
    Recruiting
  • Piedmont HealthCare, PA
    Statesville, North Carolina, United States
    Recruiting
  • Accellacare
    Wilmington, North Carolina, United States
    Recruiting
  • Southeastern Research Center
    Winston-Salem, North Carolina, United States
    Recruiting
  • University of Cincinnati
    Cincinnati, Ohio, United States
    Recruiting
  • Cleveland Clinic
    Cleveland, Ohio, United States
    Recruiting
  • Summit Health
    Bend, Oregon, United States
    Recruiting
  • The Oregon Clinic Pulmonary East
    Portland, Oregon, United States
    Recruiting
  • The Oregon Clinic Pulmonary West
    Portland, Oregon, United States
    Recruiting
  • The Pennsylvania State University
    Hershey, Pennsylvania, United States
    Recruiting
  • Thomas Jefferson University
    Philadelphia, Pennsylvania, United States
    Recruiting
  • Temple University
    Philadelphia, Pennsylvania, United States
    Recruiting
  • Lowcountry Lung and Critical Care
    Charleston, South Carolina, United States
    Recruiting
  • Medical University of South Carolina
    Charleston, South Carolina, United States
    Recruiting
  • Clinical Trials Center of Middle Tennessee
    Franklin, Tennessee, United States
    Recruiting
  • Vanderbilt Lung Institute
    Nashville, Tennessee, United States
    Recruiting
  • Baylor Scott & White Research Institute, Baylor University Medical Center
    Dallas, Texas, United States
    Recruiting

+102 more sites. See ClinicalTrials.gov for the full list.

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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  • Registry for individuals affected by pulmonary fibrosis

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  • Advanced imaging to see how immunosuppression affects lung fibrosis activity

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.