ive been having a weird reaction after taking Mucinex dm. A weird feeling like blood rushing to my head, then it stops and my body will be tingling, it kind of scares me. I took the mucinex Sunday, and ended up in the hospital, they told me I may have poisoned myself with the Mucinex and other over the counter drugs I ve been using for a cold. Now 4 days later it s Thursday and I m still getting the reaction. When will this medicine be out of my system?