I was on the prednisone for only 6 days and told to use the inhaler if the wheezing persisted. Again, that was all going on about 2-3 weeks ago. I no longer use the inhaler as the wheezing dried up and the sickness seemed to go away. I felt fine until last week when i got the flu shot, and I still dont feel "sick" per say...just some stuffed up nose and the little bit of phlegm, but the tightness in the chest and the shortness of breath has came on with a negeance in the past week gotten worse and is ongoing. I even elected twice in the past week to take and extra .5mg of my xanax as i felt the shortness of breath may be anxiety related...Ive been on the xanax for 6 months now (still on same dose, 1-.5mg pill per day) and never felt edgy enough to want to take more than prescribed, but the shotness of breath was too much for me. The extra xanax helped a bit, but ultimately it returned a short time later