Cough
"One of the best thing for coughs.  The Mucinex DX green does a great job of thinning mucus as well as stopping cough. The blue is good for colds and allergies without cough. I prefer the 600 mg tables. For me, they wear off after five hours. Take with a lot of water. The more water the better it works.  16ozs every 90 minutes makes it work the best."