Guaifen-C and sore throat

I have some kind of sickness which is going around and I couldn't hear one morning out of one ear so I went to the doctor and he prescribed me Guaifen. It worked right away after the first 30 mins my ears begin to pop and slowly return some of my hearing. The first day I took it it made me drowsy. I only take it at around the time I go to bed and it wakes me up around 7 or 8 am every time so far. I usually wake up with a really bad cough which I try not to swallow and although its supposed to help me with the cough it dosen't do anything for my sore throat. My sickness is slowly fading but the ear has not healed after the first day.

I was prescribed Guaifen PSE ER Tabs for my ears and also an antibiotic for my sore throat. I have noticed a mild loss of appetite. I also flew to Montana for a wedding and my ears wouldnt unpop after we landed, they are still acting a little funny after 4 days. I was instructed NOT to take before bed, but twice daily earlier in the day because if does cause problems when trying to fall asleep.

It sure works great for me. I think you have to know the interactions bewteen what ever medicines or herbs/vitamins you are also taking. It stopped my coughing, sore throat, and let me breathe again!

I am having the worst headache of my life, no appetite, can't sleep, and horrible dry mouth, and worst of all i dont feel any better, still coughing horrible and a sore throat doctor prescribed because i have a viral sinus infection, medicine making it worse.