Cough
"I have been taking Mucinex for about 5 months.... one in a.m. and another at 8pm.   I took it because I could not swallow any phlegm and it was difficult coughing it up.  My esophagus muscles are very weak and the phlegm would block my air waves.

Recently I have developed severe dry mouth as a side affect.  I stopped the p.m. pill, and use biotene gel, toothpaste and mouth rinse.... still no relief.  If anyone has had this problem, please let me know."