At different times/places I will suddenly start coughing non-stop with little if any mucus, except in my nose. I also sweat like I've been running - it drips off my hair into my face/neck and my eyes tear and run. I can find no common denominator - I may be sitting at home in my room (with air purifier at full), or at the grocery store or a restaurant. I take 1200 mg of Mucinex am&pm, I take a 24hr allergy pill every morning, all in addition to my Rxs for Emphysema and Bronchiectasis. Does anyone else have this issue and/or any suggestions?