Efficacy and safety of pirfenidone in systemic sclerosis-related interstitial lung disease—a randomised controlled trial

To assess the efficacy and safety of pirfenidone in systemic sclerosis-related interstitial lung disease (SSc-ILD). This was a double-blind, randomised, placebo-controlled, pilot study. Subjects with SSc-ILD and forced vital capacity (FVC) between 50 and 80% of the predicted (%pred) value were randomised in 1:1 ratio to receive either pirfenidone (2400 mg/day) or placebo for 6 months. Primary outcome was the proportion of subjects with either...