Treatment and prevention of diffuse parenchymal lung disease by selective active-site mTOR inhibitors

Embodiments are related to new uses for selective active-site mTOR inhibitors in treating or preventing pulmonary fibrosis in diffuse parenchymal lung disease (DPLD) patients, such as a DPLD of environmental cause, a collagen vascular disease (e.g., scleroderma and rheumatoid arthritis), an idiopathic interstitial pneumonia (e.g., idiopathic pulmonary fibrosis and nonspecific interstitial pneumonia), and sarcoidosis.