This trial is for patients with bronchiectasis who completed the Boehringer Ingelheim 1397-0012 Airleaf parent study. This is a continuation of the Airleaf study and is meant to assess the long-term safety, effectiveness, and tolerability of the study drug (BI 1291583). Approximately 220 patients will be enrolled into the study and will be randomized into either 1 milligram, 2.5 milligram, or 5 milligram study drug or placebo. Patients will be treated for approximately 1 year, while study staff monitor the number of patient pulmonary exacerbations.

This is a Phase 2, double-blind, randomized, placebo-controlled study to evaluate the safety, tolerability, and efficacy of AP-PA02 administered by inhalation. This study will evaluate AP-PA02 administration in stable NCFB (non-cystic fibrosis bronchiectasis) patients. Subjects will either be included in Cohort A or Cohort B. For Cohort A, subjects will be randomized to receive either inhaled AP-PA02 or placebo. Cohort A will include individuals with NCFB and confirmed chronic P. aeruginosa infection but not on chronic inhaled antibiotics. These individuals will receive wither AP-PA02 or placebo for 10 days twice a day.
Cohort B will include individuals who with NCFB and confirmed P. aeruginosa infection but who are on chronic antibiotics. These individuals will receive either AP-PA02 or placebo for 10 days plus their current inhaled antibiotics for 28 days.