Robitussin DM comes in a liquid form that you take by mouth. It comes in regular-strength, maximum-strength, sugar-free, and children’s formulations. Robitussin DM contains two active ...

Robitussin products are commonly used to treat cough and chest congestion. The main active ingredients in most products are guaifenesin and dextromethorphan Guaifenesin is an expectorant that ...

Here’s a comparison of these drugs to help you make your decision. The active ingredient in Robitussin and Mucinex DM products, dextromethorphan, is an antitussive, or cough suppressant.

which is one of the main active ingredients in Robitussin DM, Robitussin Cough & Cold, Mucinex, and Mucinex DM. It turns out that the combo can help you get out of bed and back to feeling better.