A Study in Patients With Non-cystic Fibrosis Bronchiectasis to Test How Well Different Doses of BI 1323495 Are Tolerated and How BI 1323495 Affects Biomarkers of Inflammation

This study is open to adults with non-cystic fibrosis bronchiectasis. The main purpose of this study is to find out how a medicine called BI 1323495 is tolerated by people with non-cystic bronchiectasis. The study tests 2 different doses of BI 1323495. Some of the participants get placebo. It is decided by chance who gets BI 1323495 and who gets placebo. Participants take BI 1323495 or placebo as tablets twice a day for 3 months. Placebo tablets look like BI 1323495 tablets but do not contain any medicine. Participants can also continue taking standard medicines for noncystic bronchiectasis throughout the study. Participants are in the study for about 4 months. During this time, the participants visit the study site about 11 times and get about 2 phone calls. At the visits, doctors check the health of the participants and note any health problems that could have been caused by BI 1323495.