I have a hacking cough , lost of sense of smell and taste , and now a metallic taste after I cough and when I bend forward. Doc ( ENT ) has me on predisone 20mg (3 day for 3 days, 2 day for 2 days, 1 day for 3 days), Aevlox, and codiene cough syurp. It s the weekend. Could this just be medicine side effects? My cough is better, now nearly as much coughing now and not as violet. some sense of taste is back....hense I taste metal. Any ideas?