Phase 2 COPD Trial, Recruiting
Who may be able to join
AI generated eligibility summary. Written by an AI model from the official source data and checked on a sample basis. It can contain mistakes, so confirm anything important against the original source. How we use AI
Who might be able to join this trial:
- People aged 40 to 80 years who have smoked at least 10 pack-years (for example, one pack per day for 10 years) and have been diagnosed with COPD based on established medical guidelines.
- People whose breathing test results show a specific level of airflow limitation — measured before and after using a reliever inhaler — that falls within a moderate-to-severe range as defined by the trial.
- People who have been regularly using a bronchodilator (airway-opening) medication for COPD for at least 4 weeks before the screening visit, and who agree to use a once-daily COPD maintenance medication supplied by the study throughout the trial.
- People who are able to correctly use a jet nebuliser (a device that turns liquid medicine into a mist for breathing in), follow all study rules and procedures, perform breathing tests to an acceptable standard, and produce a sputum (mucus) sample when asked.
Who may not be able to join:
- People who have been diagnosed with another lung condition in addition to COPD, such as asthma, cystic fibrosis, or significant bronchiectasis.
- People who were hospitalised for COPD, pneumonia, or COVID-19 in the 12 weeks before screening, or who test positive for an active COVID-19 infection at screening (confirm with trial site for re-screening rules after 30 days).
- People whose blood test results show certain elevated liver markers (ALT, alkaline phosphatase, or bilirubin) above the levels defined in the trial criteria.
- People who have HIV or another condition that weakens the immune system.
- People with a history of cancer in the past 5 years, with the exception of certain treated skin cancers (basal cell or squamous cell carcinoma of the skin).
- People who have certain abnormal heart rhythm findings on an ECG (heart tracing test) at screening, including a specific measurement called the QT interval being too long, or a history of serious heart rhythm problems or long QT syndrome.
- People with a known history of difficulties or poor outcomes with sputum induction (the procedure used to collect mucus samples).
- People who have a known allergy or sensitivity to ensifentrine or other medications used in the study, such as albuterol or salmeterol.
- People for whom the study's once-daily COPD maintenance medication is not suitable based on the medication's listed warnings or contraindications.
- People currently taking medications that are not permitted under the trial's rules.
- People who have previously received Ohtuvayre or a blinded nebulised study medication as part of an ensifentrine (RPL554) trial.
- People who have used an experimental drug or device within 30 days (or 5 half-lives, whichever is longer) before screening, or who are in a follow-up phase of another clinical trial within 30 days before screening.
- People who have any other medical condition, uncontrolled illness, or other concern that the trial investigator considers makes participation unsuitable.
Important: Always verify eligibility with the trial site directly before applying.
Based on publicly available eligibility criteria from ClinicalTrials.gov. Verify directly with the trial site before acting. This is not medical advice.
Contact this trial
Phone: 1-888-577-8839
Contact details sourced from ClinicalTrials.gov. Verify directly with the trial site before attending.
GP referral letter
Print a one-page summary to share with your doctor.
Trial details
Where this trial is recruiting
Primary endpoints
The change from baseline in sputum neutrophils at Week 8 (absolute change in cell numbers)
Can't join this trial?
Data last synced from ClinicalTrials.gov: 19 July 2026. Trial status can change. Always verify current status directly with the trial site before making any decision.