have had a chronic cough for over two years. I
have no other cold symtoms. I can
feel congestion building in my chest and I cough to release it. An immunologist diagnosed me with asthma and prescribed Advair and something to release the chest congestion, Guaifenex. I understand that I will be taking the Advair for the indefinite future, however when I stop taking the Guaifenex for even a day or two my chest congestion returns. I've been taking it for four months now.