NEJM - Acetlycysteine for Pulmonary Fibrosis

"Randomized Trial of Acetylcysteine in Idiopathic Pulmonary Fibrosis"
http://www.nejm.org/doi/full/10.1056/NEJMoa1401739?query=featured_home 
"CONCLUSIONS

As compared with placebo, acetylcysteine offered no significant benefit with respect to the preservation of FVC in patients with idiopathic pulmonary fibrosis with mild-to-moderate impairment in lung function. (Funded by the National Heart, Lung, and Blood Institute and others; ClinicalTrials.gov number, NCT00650091.)"