Losartan and Inflammation in Cystic Fibrosis

The purpose of the study is to examine if a specific drug called losartan (Cozaar ®), generally used to treat high blood pressure and to protect kidneys from damage in patients suffering from Diabetes Mellitus, will have any effect on the nasal inflammation in patients with cystic fibrosis (CF). The study will be performed at the Pulmonary Division at the University of Miami, Cincinnati Children's Medical Hospital Center, University of Kansas Medical Center and University of Alabama-Birmingham.