Cough and Nasal Congestion
"This medicine is somewhat effective for me. I made the mistake of taking it before bed (I wish my doctor had warned me) and experienced a racing heart/was up most of the night. It did clear my sinuses, but not for 12 hours straight. I woke up at around 6 am (having taken the medicine around 11 pm) with my nose entirely clogged again. I&#039;m going to take Mucinex D again today, but not at night. I guess I&#039;ll just have to suffer tonight rather than be a complete insomniac."