Guaifen-C and stimulant

The doctor's office prescribed Guaifen for this inner ear ache. The pharmacist explained that this medication has a stimulant. Since I'm a heavy diet pepsi consumer, I didn't think that Guaifen would keep me awake. After two hours of sleep I awoke and can't go back to sleep. As prescribed, drinking a lot of water goes with the medication; the side effect is frequent trips to the bathroom. Now, its 6am and I wonder when I will sleep again.

it's amazing how many people experience pretty much the same side affects from this medicine that is supposed to help us... i too have experienced most of the symptoms everyone else has.. i hate taking medicine for congestion. it's either a stimulant or a downer. so i guess living with congestion and pressure in my ears is the answer.. have been living with it for about 15 years..

I, too, have been feeling a bit buzzed.

It's 4 a.m., I normally go to sleep at midnight, and while my eyes are tired, the rest of me isn't.

The only change in my routine is an antibiotic for a cold, and this stuff. Is it known to be a stimulant?