“Diffuse parenchymal lung disease may be idiopathic, but there are a number of identified causes such as environmental or occupational exposures. Many collagen vascular diseases and medications used to treat them can induce interstitial lung disease. Common offenders also include amiodarone and nitrofurantoin, which can induce a pneumonitis. In this patient, lisinopril might explain the cough but not the dyspnea, crackles, or abnormal spirometry.” ABFM
