Overview Examination of Pirfenidone (EsbrietĀ®) Therapy in Coal Workers' Pneumoconiosis With Pulmonary Fibrosis Status: Recruiting Trial end date: 2022-04-01 Target enrollment: Participant gender: Summary Examination of pirfenidone (EsbrietĀ®) therapy in coal workers' pneumoconiosis (black lung) with pulmonary fibrosis (scarring of the lung). Phase: Phase 2 Details Lead Sponsor: Pulmonary Research of Abingdon, LLCCollaborator: Genentech, Inc.Treatments: Pirfenidone