For the first time, researchers have shown that a class of anti-fibrotic drugs slows the progression of interstitial lung disease (ILD) in patients with rheumatoid arthritis (RA). Research conducted in part at National Jewish Health showed that pirfenidone was safe and effective in these patients. The study, published earlier this month in the journal The Lancet Respiratory Medicine, is the first prospective treatment trial of patients with RA-ILD.