There are also homepathic remedies, which also might be available in a drug store, for sinus and
chest congestion. A good tea is Gypsy
Cold Care by Traditional Medicinals. Other clearing herbs are wild cherry bark, slippery elm, coltsfoot, and many others, but again, you'll probably need a health food store to find them. As for OTC medication, I wouldn't know, as I don't use it for that purpose.