Cough
"I was suffering from a severe virus-caused sore throat with terrible coughing.  My PCP advised me to take Mucinex but at substantially greater dosage than the package recommends.  I did so for about 3-4 weeks.  The medication did help relieve my coughing, but it interfered so badly with my sleep that I had to discontinue taking it.  I notice that other people have experienced sleep problems with Mucinex.   There should be a warning about this on the package label."