Sildenafil improves walk distance in idiopathic pulmonary fibrosis Home › Forums › Podcast Discussion › Sildenafil improves walk distance in idiopathic pulmonary fibrosis This topic has 0 replies, 1 voice, and was last updated 7 years, 4 months ago by inamginla1994. You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In