cough and nasal congestion
"My doctor told me that the key to mucinex working effectively is to take it with a full 8 oz of water and then keep drinking water throughout the day. The water is what helps thin it out. If I don't drink plenty of water with it it doesn't work. When I do it often works all day and night. I take it early in the day because it does keep me awake. I hope this helps, good luck & I hope you feel better.
* use a humidifier too, the moisture in the air keeps you from drying out."