Guaifenesin
bronchitis
"I have COPD and have been using guaifenesin for several years. It works wonders and for coughs, I think the liquid soothes your throat better. BUT IT IS IMPORTANT NOT to get the "DM" or any version of it with dextromethorphan in it. Those of you having dream disturbances or nervous reactions are surely using this.  You want to buy the plain "TUSSIN" that is only an expectorant and nothing else. Also drink plenty of fluids to help liquidize the mucus. I will swear by this stuff, but you have to read the labels and be careful what you buy. "