A Study to Assess the Lung Exposure Bioequivalence of Budesonide, Glycopyrronium, & Formoterol (BGF) metered dose inhaler (MDI) Hydrofluoroolefin (HFO) with a spacer (Treatment B), BGF MDI Hydrofluoroalkane (HFA) with a spacer (Treatment A), as well as BGF MDI HFO without a spacer (Treatment C)

Exclusion Criteria

• - History or current evidence of any clinically significant disease or disorder, including endocrinological diseases, such as thyrotoxicosis, which, in the opinion of the investigator, may either put the participant at risk because of participation in the study, or influence the results through participation in the study.
• - History or presence of gastrointestinal, hepatic, or renal disease, or any other condition known to interfere with absorption, distribution, metabolism, or excretion of drugs.
• - Any clinically significant illness, medical/surgical procedure, or trauma within 4 weeks of the first administration of investigational medicinal product (IMP).
• - History of narrow angle glaucoma or change in vision.
• - History of symptomatic prostatic hypertrophy or bladder neck obstruction/urinary retention.
• - Unresectable cancer that has not been in complete remission for at least 5 years.
• - Any clinically significant abnormalities in clinical chemistry, hematology, or urinalysis results.
• - Any clinically significant abnormal findings in physical examination or vital signs at screening, as judged by the investigator. Eg., Systolic blood pressure (BP) less than (<) 90 millimeters of Mercury (mmHg) or greater than or equal to (>=) 140 mmHg and diastolic BP < 50 mmHg or >=90 mmHg; Heart rate < 50 beats per minute (bpm) or > 90 bpm.
• - Any clinically significant abnormalities on 12-lead electrocardiogram (ECG) at screening, as judged by the investigator.
• - Any positive result on screening for serum hepatitis B surface antigen (HBsAg) OR anti-hepatitis B core (HBc) antibody, indicative of hepatitis B, hepatitis C antibody, or human immunodeficiency virus (HIV).
• - Positive reverse transcription polymerase chain reaction (RT-PCR) test for SARS-CoV-2 prior to randomization.
• - Participant has clinical signs and symptoms consistent with Coronavirus disease 2019 (COVID-19), eg, fever, dry cough, dyspnea, sore throat, fatigue, new smell or taste disorder or confirmed infection by appropriate laboratory test within the last 4 weeks prior to screening or on admission.
• - Participant who had severe course of COVID-19 (ie, hospitalization, extracorporeal membrane oxygenation, or mechanically ventilated).
• - Recent (within 14 days prior to admission to the Clinical Unit) exposure to someone who has COVID-19 symptoms or tested positive for SARS-CoV-2.
• - History of any respiratory disorders such as asthma, Chronic obstructive pulmonary disease (COPD), or idiopathic pulmonary fibrosis.
• - Known or suspected history of drug abuse, as judged by the investigator.
• - Has received another new chemical entity (defined as a compound which has not been approved for marketing) within 30 days or 5 half-lives (whichever is longest) of the first administration of IMP in this study.
• - Plasma donation within one month of screening or any blood donation/loss more than 500 mL during the 3 months prior to screening.
• - History of severe allergy/hypersensitivity or ongoing allergy/hypersensitivity to drugs with a similar chemical structure or class to BGF or to its excipients, such as norflurane.
• - Current smokers or those who have smoked or used nicotine products (including e-cigarettes) within the 3 months prior to screening.
• - Positive screen for drugs of abuse or cotinine at screening or on admission to the Clinical Unit or positive screen for alcohol at screening or on admission to the Clinical Unit.
• - Use of drugs with enzyme-inducing properties such as St John’s Wort within 3 weeks prior to the first administration of IMP.
• - Use of any prescribed or non-prescribed medication including antacids, analgesics (other than paracetamol/acetaminophen), herbal remedies, megadose vitamins (intake of 20 to 600 times the recommended daily dose) and minerals during the 2 weeks prior to the first administration of IMP or longer if the medication has a long half-life.
• - Known or suspected history of alcohol or drug abuse or excessive intake of alcohol as judged by the investigator. Excessive intake of alcohol defined as the regular consumption of more than 24 g of alcohol per day for men or 12 g of alcohol per day for women.
• - Excessive intake of caffeine-containing drinks or food (eg, coffee, tea, chocolate).
• - Participants who have previously received BGF MDI HFO.