Clairleafᵀᴹ: A Study to Test Long-term Treatment With BI 1291583 in People With Bronchiectasis Who Took Part in a Previous Study With This Medicine

This study is open to adults aged 18 years and older with bronchiectasis. People can join the study if they were previously enrolled in another study with BI 1291583 (1397-0012: Airleafᵀᴹ or 1397-0013 Clairaflyᵀᴹ). The purpose of this study is to find out whether a medicine called BI 1291583 helps people with bronchiectasis, an inflammatory lung condition. The investigators also want to know how well people with this condition can tolerate BI 1291583 in the long term. Participants take a low, medium, or high dose of BI 1291583 as a tablet once a day for up to 1 year. Participants who were taking placebo in the AirleafTM or ClairaflyTM study are put into the BI 1291583 dosage groups randomly, which means by chance. Placebo tablets look like BI1291583 but do not contain any medicine. Participants who were taking BI 1291583 in the AirleafTM or ClairaflyTM study continue to take the same dose. Participants visit the study site 10 times and get 4 phone calls from the site staff. During the visits, the doctors collect information on any health problems of the participants. The doctors also check whether BI 1291583 helps reduce the symptoms of bronchiectasis.

Inclusion Criteria: * Patients who completed the treatment period in Phase II trials (1397-0012 or 1397-0013) as planned per protocol. * Male or female patients. Women of childbearing potential (WOCBP) must be ready and able to use highly effective methods of birth control per ICH M3 (R2) that result in a low failure rate of less than 1% per year when used consistently and correctly, as well as one barrier method. A list of contraception methods meeting these criteria is provided in the patient information. * Signed and dated written informed consent prior to admission to the trial, in accordance with Good Clinical Practice (GCP) and local legislation. Exclusion Criteria: Laboratory and medical examination * Moderate or severe liver disease (defined by Child-Pugh score B or C hepatic impairment) or aspartate aminotransferase (AST) and/or alanine aminotransferase (ALT) \>3.0x Upper limit of normal (ULN) at Visit 1 (or at the last safety assessment in the parent trial, if no more than 6 weeks passed since then). * Estimated glomerular filtration rate (eGFR) according to Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) formula \