liz, you nerd, cough if you're in here! shh! i took mucinex dm for my phlegmy cough. what about rob's dry cough? works on that too, and lasts 12 hours. 12 hours?! who studies that long? mucinex dm relieves wet and dry coughs. ♪ all the gifts you really, really, really, can't wait to unwrap. ♪ joy. fully. ♪