A Study to Test How BI 1291583 is Taken up in the Blood of People With and Without Liver Problems

This study is open to adults aged between 18 and 80 years of age with a body mass index (BMI) of 18.5 to 42 kg/m². People with or without liver problems can take part in the study. The purpose of this study is to find out how much of a medicine called BI 1291583 gets into the blood of people with and without liver problems. BI 1291583 is being developed to treat people with bronchiectasis, a chronic disease of the lungs. People living with this condition often also have liver problems. Therefore, it is important to find out whether liver problems influence the amount of BI 1291583 that gets into the blood. Study participants receive a single dose of BI 1291583 as a tablet taken by mouth. Participants are divided into 4 groups based on how well their liver works: 1 group without liver problems, and 3 groups with mild, moderate, and severe liver problems. Each participant without liver problems is matched with participants from the other groups based on factors such as age, sex, smoking habits, and body weight to ensure accurate comparisons. Participants are in the study for about 3 months. They stay for 3 days at the study site and also visit the study site up to 9 times. During these visits, the doctors collect information about participants' health. To assess the study endpoints, the doctors regularly take blood samples from the participants. The doctors regularly check participants' health and take note of any unwanted effects.