Webmucinex d and mucinex dm both contain the expectorant guaifenesin (which is contained as a single ingredient in mucinex). It has two active ingredients: Guaifenesin is an expectorant that helps.

Webwhat is the difference between mucinex d and dm? Mucinex d and mucinex dm both contain guaifenesin as an active ingredient. Mucinex contains guaifenesin only and is used. Mucinex dm what's the difference? Webthe main difference between mucinex, mucinex d, and mucinex dm is the active ingredients in each brand name.

Webthe main difference between mucinex, mucinex d, and mucinex dm is the active ingredients in each brand name.