I was prescribed Ventolin every 4hrs, Prednisone 10mg tabs, Azithromycin 250mg tabs, & the Generic of Duoneb 4 times a day. I started having problems with my heart after only 2 doses of azithromycin. I have stopped all meds trying to get everything to clear out of my system. How long should all this take? I was prescribed all of this for bronchitis, & to help with asthma.