I have had problems with sinus congestion, and was going to buy some muscinex, however on reading about it, it seems to be for cough and lung congestion. Does it also help sinus congestion and alot of thick mucous ? I know its used for fibro as I took it while it was a script. also can u still get it as a script as musinex is expensive, other than mailing it to Ca? Why does Ca only seem to have it as a script. FIBROFOG HERE?