Oral prednisone has been misused and also makes one prone to bacterial lung infection, but on a short-term (a very short term - no more than five days), it seems to be very helpful in reducing the time that the lung returns to normal. Foradil (
formoterol fumarate) can also be helpful until the lung "settles down", even if you don't use it 365 days a year.
As far as the "shortnress of breath" being linked to the asthma - probably, but not necessarily.