Cough and Nasal Congestion
"I took mucinex the capsule as directions state to help me with severe congestion the night before Thanksgiving.  After reading the reviews I must say it had the opposite effect on me, it made me tired.  The best way for me to describe it was I get like I took a muscle relaxer but not as strong.  Just made me feel slightly weak and needed to sleep.  Although, definitely helped relieve my symptoms from being congested such as my headache and cough.  So for my sake I would want to take it at night and definitely not have to drive anywhere.  I am not one to take medication or any drugs for that matter."