Is there anybody out there that hasn't felt the same since they took Mucinex DM?? Like for months afterward? What symptoms do you have? Please if you could help that would be great. I'm still not sure that my physical problems are a cause of taking it back in January, but it seems a bit odd that I haven't felt the same since I took it.. I still wonder about it, even though the docs kept saying it wasn't because of it..