Guaifenesin the active ingredient in Mucinex, is an expectorant. Expectorants help people cough or sneeze to remove excess ...

Women are claiming the viral "Mucinex Method" — taking the over-the-counter decongestant during their fertile window — is ...

The FDA announced late last year that it was considering pulling “not effective” nasal decongestants — including DayQuil, Sudafed and Mucinex ... as the only active ingredient.