pulmonary hypertension
"I have been using Tyvaso for 4 months, the first three I saw no improvement. Now I do feel a little better but not much. I live 5 short blocks away from the Mayo clinic in Rochester Mn. and I have to sit down for a few minutes each block to catch my breath. Yesterday it took me 40 minutes to go a   quarter mile. Even walking upstairs is hard for me. I just don't know what to do."