When changing to a different one I found that it didn't go away. (mucus
in the throat that I can't clear and
a need to cough and
try to clear my throat until it get's irritated and sore and I lose my voice if I talk much.) Next they thought it was a reaction to my blood-sugar medicines, Metformin, Avandia, Glipizide, and so I stopped taking them but that didn't take care of the problem either. I have been in the Emergency Room three times in that same period of time and to my Doctor five times.