InterMune Inc. announced that it will initiate an open-label roll-over study to evaluate the long-term safety of pirfenidone in patients with idiopathic pulmonary fibrosis (IPF)who have completed one of the two concurrent Phase III CAPACITY trials of pirfenidone in IPF. Pirfenidone, which has been granted orphan drug designation in the both the U.S. and Europe, has depicted positive impact on lung function and disease progression in patients suffering from the fatal IPF disease.