I took 2 tablets of Mucinex DM, it dried up the mucus, but did not really suppressed my cough. I don't feel better because it caused me to have extreme dry mouth. I feel more chest compression than before. I also feel dizzy and i afraid to sleep because I'm afraid the dosage may have been a little too much for me. I don't like the way I'm feeling right now and is up in the middle of the night to research side effects of Mucinex. I will never take Mucinex again. I hope this medication wares off soon.