I took Mucinex D (about four pills so far) and while the breathing was a little better, I mostly notice that I still have quite a bit of stuffiness and now feel that it's all dried up, where I can't blow it out. I thought that this was supposed to loosen phlegm /mucus making it easier to expel from system??? I also experienced a sensation of something being lodged deep in my upper eye lid, and have NOT been able to sleep properly at all while taking this (particularly if taken at a late hour) It is now 2 AM and I' feel like I'm still feeling pretty wired. ALL these side effects should DEFINITELY be included in the box. The fact that it's NOT included does make me wonder quite a bit???