I have had a respiratory condition for over 2 yeas now. The pulmonologist says that it is not p. fibrosis, "it presents as bronchiolitis." Am taking small doses of prednisone (started at 60, but side effects were terrible) 500/50 Advair, Flonase, full dose Biaxin. For other conditions, also take pravacol, zetia, atacand (32mg) HCTZ, Atenolol, doxazosin. AM 60, formerly very active and energetic. Now, stairs present a challenge. I think that the prednisone has weakened me, but are the other drugs contributing to muscle weakness?