Clinical trial Recruiting at 22 sites Phase1; Phase2 Interventional Ages 18 to 75

Evaluating EP-104IAR for treating eosinophilic esophagitis in adults

Official title: A Phase 1b/2 Trial Evaluating the Safety, Pharmacokinetics, and Efficacy of EP-104GI in Adults With Eosinophilic Esophagitis (RESOLVE)

Run by Eupraxia Pharmaceuticals Inc. · NCT05608681 · Data updated 2026-11-12

This study is testing a new treatment called EP-104IAR to see if it can help adults with eosinophilic esophagitis feel better.

Quick facts

PhasePhase1; Phase2
Study typeInterventional
Ages18 Years to 75 Years
SexAll
Enrollment117 (estimated)
SponsorEupraxia Pharmaceuticals Inc.
Industry-sponsored
Locations23 sites (Sydney, New South Wales and 22 other locations)
StatusRecruiting
StartedMarch 31, 2023
Main results expectedDecember 2026
Study endsDecember 2026
Registry record updatedMarch 19, 2026
Trial IDNCT05608681 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults with symptomatic eosinophilic esophagitis who can adhere to study procedures.

Probably not a fit

Patients with other significant esophageal diseases or conditions that interfere with the study may not benefit from this trial.

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

What this trial studies

This is an open-label, dose-escalation trial assessing the safety, tolerability, and pharmacokinetics of EP-104IAR in adults diagnosed with eosinophilic esophagitis (EoE). The study will enroll approximately 27 to 33 participants across multiple dose cohorts, with additional participants in selected tolerable dose regimens to identify the recommended phase 2 doses. Participants will undergo endoscopic and histologic evaluations to measure the local effects of the treatment on EoE disease activity over a period of 24-52 weeks.

Why it matters

Potential benefit: If successful, this treatment could provide a new therapeutic option for patients suffering from eosinophilic esophagitis.

How similar studies have gone: While this approach is novel, similar studies targeting eosinophilic esophagitis have shown promise in exploring new treatments.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Symptomatic EoE;
* For women of childbearing potential, a negative pregnancy test and willing to use a highly effective method of birth control until end of study;
* Willing and able to adhere to study-related procedures and visit schedule;
* Willing and able to provide informed consent.

Criteria for crossover to EP 104GI from vehicle control (randomized dose optimization portion):

1. Has completed the randomized dose optimization portion of the trial to Week 24, inclusive
2. Without safety concerns for receiving EP 104GI ie, does not meet exclusion criteria or have other safety issue

Exclusion Criteria:

* Concomitant esophageal disease, relevant GI disease, or any condition, history, or laboratory abnormality that might interfere with the study;
* Oral or esophageal mucosal infection of any type (bacterial, viral, or fungal);
* Oropharyngeal or dental conditions that prevents normal eating;
* Severe esophageal motility disorders other than EoE;
* Contraindication to or factors that substantially increase risks associated with EGD or biopsy, or narrowing of the esophagus that precludes EGD with a standard 9-10 mm endoscope, stricture requiring dilation within 8 weeks prior to Screening, or the need for dilation prior to EGD at Baseline;
* Any condition for which the use of corticosteroids is contraindicated (Participants with well controlled non-insulin dependent diabetes are permitted);
* Active or quiescent systemic fungal, bacterial, viral, or parasitic infections, or ocular herpes simplex. Or recent use of IV or oral antibiotics;
* Hypersensitivity, or intolerance to corticosteroids, or to any of the ingredients in the investigational medicinal product, including carboxymethyl cellulose, and polysorbate 80, or to the ingredients in Synacthen / cosyntropin (used in the ACTH stimulation test);
* Recent use of disallowed medications, or unwillingness to not use disallowed medications during the study;
* Recent initiation of a elimination or elemental diet (dietary therapy must remain stable throughout the study);
* Morning serum cortisol level ≤ 5 μg/dL (138 nmol/L);
* Clinically significant abnormal laboratory values;
* Recent or currently planned participation in another interventional trial ;
* Previous participation in this study and had received study treatment;
* Females who are pregnant, breastfeeding, or planning to become pregnant during the study;
* Malignancies or history of malignancy within prior 5 years, except for treated or excised non-metastatic BCC, SCC of the skin, or cervical carcinoma in situ;
* History of alcohol or drug abuse;
* Any other reason, that, in the Investigator's opinion, unfavorably alters participant risk, confounds results, or prevents the participant from complying with study requirements.

Where it's running

  • Campbelltown Private Hospital
    Sydney, New South Wales, Australia
    Recruiting
  • Mater Hospital Brisbane
    Brisbane, Queensland, Australia
    Recruiting
  • Princess Alexandra Hospital
    Brisbane, Queensland, Australia
    Recruiting
  • Coastal Digestive Health
    Maroochydore, Queensland, Australia
    Recruiting
  • Royal Adelaide Hospital
    Adelaide, South Australia, Australia
    Recruiting
  • Eastern Health Box Hill
    Box Hill, Victoria, Australia
    Recruiting
Show 17 more locations
  • Northern Hospital Epping
    Epping, Victoria, Australia
    Recruiting
  • The Alfred Hospital
    Melbourne, Victoria, Australia
    Recruiting
  • Royal Melbourne Hospital
    Parkville, Victoria, Australia
    Recruiting
  • University of Calgary
    Calgary, Alberta, Canada
    Recruiting
  • UoA - South Edmonton Gastroenterology Research Clinic
    Edmonton, Alberta, Canada
    Recruiting
  • G.I. Research Institute
    Vancouver, British Columbia, Canada
    Recruiting
  • McGill University Health Center
    Montreal, Quebec, Canada
    Recruiting
  • Erasmus University Medical Center
    Holland, Netherlands
    Recruiting
  • Aotearoa Clinical Trials
    Papatoetoe, Auckland, New Zealand
    Recruiting
  • Waikato Hospital
    Hamilton, New Zealand
    Recruiting
  • Capital Coast and Hutt
    Lower Hutt, New Zealand
    Recruiting
  • Universitätsspital Zürich
    Zurich, Switzerland
    Recruiting
  • Norfolk and Norwich University Hospital
    Norwich, Norfolk, United Kingdom
    Recruiting
  • Cardiff and Vale University Health Board-Wales
    Cardiff, United Kingdom
    Recruiting
  • Royal Liverpool University Hospital
    Liverpool, United Kingdom
    Recruiting
  • St George's University of London
    London, United Kingdom
    Recruiting
  • Amsterdam UMC
    Amsterdam, Netherlands
    Active not recruiting

Study contacts

Similar studies

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

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 2026-11-14 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.