A study to investigate the effect on lung function of an approved COPD treatment (BGF, with HFA propellant) compared to BGF formulated with a new propellant (HFO) in participants 40 to 80 years of age with COPD

Exclusion Criteria

• Medical Conditions
• 1.Confirmed diagnosis of asthma, in the opinion of the Investigator based on thorough review of medical history and medical records.
• 2.COPD due to α1-antitrypsin deficiency.
• 3.A COPD exacerbation treated with systemic corticosteroids or antibiotics within 4 months prior to Visit 1 or during the Screening Period.
• 4.A COPD exacerbation that required hospitalisation within 12 months prior to Visit 1 or during the Screening Period.
• 5.A respiratory infection ending within 4 weeks prior to Visit 1 or beginning or ending during the Screening Period, per the Investigator’s judgement.
• 6.Life-threatening COPD (eg, need for mechanical ventilation) at any time prior to Visit 1 or during the Screening Period.
• 7.A SARS‑CoV‑2 infection in the 8 weeks prior to Visit 1 or during the Screening Period, or that required hospitalisation at any time prior to Visit 1 or during the Screening Period.
• 8.Sleep apnoea that, in the opinion of the Investigator, is uncontrolled.
• 9.Other respiratory disorders including, but not limited to, known active tuberculosis, lung cancer, cystic fibrosis, significant bronchiectasis (high-resolution CT evidence of bronchiectasis that causes repeated acute exacerbations), severe neurological disorders affecting control of the upper airway, sarcoidosis, primary ciliary dyskinesia, idiopathic interstitial pulmonary fibrosis, primary pulmonary hypertension, or pulmonary thromboembolic disease.
• 10.Significant or unstable ischaemic heart disease, arrhythmia, cardiomyopathy, heart failure, uncontrolled hypertension as defined by the Investigator, or any other relevant cardiovascular disorder as judged by the Investigator.
• 11.Diagnosis of narrow-angle glaucoma that has not been adequately treated, or a change in vision that may be relevant, in the opinion of the Investigator.
• Note: All medications approved for control of intraocular pressures are allowed, including topical ophthalmic nonselective beta-blockers and prostaglandin analogues.
• 12.Symptomatic prostatic hypertrophy or bladder neck obstruction/urinary retention that, in the opinion of the Investigator, is clinically significant.
• 13.Unresectable cancer that has not been in complete remission for at least 5 years prior to
• Visit 1.
• Note: Squamous cell and basal cell carcinomas of the skin are allowed.
• 14.Historical or current evidence of a clinically significant disease including, but not limited to: cardiovascular, hepatic, renal, haematological, neurological, endocrine, gastrointestinal, or pulmonary. Immune deficiency disorders (ie, HIV infection) should be excluded even if controlled. Significant is defined as any disease that, in the opinion of the Investigator, would put the safety of the participant at risk through participation, or that could affect the efficacy or safety analysis if the disease/condition is exacerbated during the study.
• 15.Participants with a known hypersensitivity to beta2-agonists, muscarinic antagonists, or corticosteroids, or any component of the MDI.
• 16.Known history of drug or alcohol abuse within 12 months of Visit 1 or known abuse at any time during the study.
• 17.History of QT prolongation associated with another medication that required discontinuation of that medication.
• Prior/Concomitant Therapy
• 18.Unable to abstain from short-acting bronchodilators within 6 hours prior to lung function testing at each study visit.
• 19.Pulmonary resection or lung volume reduction surgery during the 6 months prior to Visit 1 (ie, lobectomy, bronchoscopic lung volume reduction [endobronchial blockers, airway bypass, endobronchial valves, thermal vapour ablation, biological sealants, and airway implants]).
• 20.Long-term-oxygen therapy or nocturnal oxygen therapy required for greater than 15 hours per day.
• Note: As-needed oxygen use is allowed.
• 21.Trans-urethral resection of the prostate or full resection of the prostate within 6 months prior to Visit 1.
• 22.Unable to abstain from any protocol-defined prohibited medications during the Screening or Treatment Periods (see Section 6.9).
• 23.Use of any herbal products by either inhalation or nebuliser within 2 weeks prior to Visit 1 or refusal to stop use for the duration of the study.
• Prior/Concurrent Clinical Study Experience
• 24.Participation in another clinical study with a study intervention administered within 30 days or 5 half‑lives, whichever is longer, prior to Visit 1.
• Diagnostic Assessments
• 25.Participants with ECG QTcF interval > 480 milliseconds.
• 26.Participants with high-degree atrioventricular block II or III, or with sinus node dysfunction with clinically significant pauses who are not treated with pacemaker.
• 27.Any clinically relevant abnormal findings in physical examination, clinical chemistry, haematology, urinalysis, vital signs, or ECG which, in the opinion of the Investigator, may put the participant at risk because of their participation in the study.
• Other Exclusions
• 28.Planned hospitalisation during the study.
• 29.Involvement in the planning or conduct of the study (applies to both AstraZeneca staff and staff at the study sites).
• 30.Study Investigators, sub-Investigators, coordinators, and their employees or immediate family members.
• 31.Judgement by the Investigator that the participant should not participate in the study if the participant is unlikely to comply with study procedures, restrictions, and requirements.
• 32.Previous randomisation in the present study.
• 33.For women only: currently pregnant (confirmed with positive pregnancy test), breastfeeding, or planned pregnancy during the study, or FOCBP not using acceptable contraception measures.