Efficacy & Safety of Nintedanib in Patients With Progressive Fibrosing Coal Mine Dust-Induced Interstitial Lung Disease

Assess efficacy (as measured by annual rate of decline in FVC) and safety. The hypothesis is that nintedanib will be safe and effective therapy for patients with progressive fibrosing CMD-ILD over a period of 52 weeks. Test Article - Nintedanib 150 mg administered PO twice daily or matching placebo. A total of 160 patients meeting inclusion/exclusion criteria will be randomized in a 1:1 ratio to either oral nintedanib 150 mg (n=80) or matching placebo (n=80) twice daily. A randomization scheme will be used that balances the group for potential confounders (proportion with PMF or small opacity-only PF-CMD\_ILD and proportion of ever- or never-smokers). The dose of the study drug may be reduced to 100 mg twice daily or interrupted temporarily to manage adverse events (AEs).