Investigation of Drug-drug Interaction Between Nintedanib and Pirfenidone in Patients With IPF (an Open Label, Multiple-dose, Two Group Study)

The primary objective of this study is to investigate the effect of steady state pirfenidone on the pharmacokinetics of nintedanib and its metabolites following oral administration of 2403 mg/day pirfenidone and to investigate the effect of steady state nintedanib on the pharmacokinetics of pirfenidone at steady state following oral administration of 150 mg bid nintedanib. There will be two cohorts of patients; the first one will consist of patients not treated with pirfenidone or nintedanib, while the second one will consist of patients on pirfenidone treatment.