Over-the-counterLower-cost generic availableClass: Respiratory

Robitussin Dm

(guaifenesin / dextromethorphan)

Over-the-counterLower-cost generic availableClass: Respiratory
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5.05Robitussin DM

Breaks up mucus and relieves cough.

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Our bottom line

Robitussin Dm (Guaifenesin / Dextromethorphan) is okay for loosening congestion in your chest and throat, but it could prevent you from coughing the mucus up. You have to take it more often than other guaifenesin products.


  • Robitussin Dm (Guaifenesin / Dextromethorphan) is a combination medicine that relieves multiple cold symptoms. It's good to use if you have chest congestion and a cough.
  • Helps loosen the mucus and phlegm that builds up and causes productive, wet coughs.
People’s experience with Robitussin DM

724reviews so far. What do you think?

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  • Robitussin Dm (Guaifenesin / Dextromethorphan) isn’t useful if you have a dry cough without mucus or phlegm.
  • The two medications in this product could potentially work against each other. Guaifenesin makes mucus easier to cough up, while dextromethorphan (the "DM" in Robitussin Dm (Guaifenesin / Dextromethorphan)) stops you from coughing.
  • Needs to be taken more often during the day than other products with guaifenesin, like Mucinex.
  • Can cause sleepiness, dizziness, and an upset stomach.
How it works

Robitussin Dm (Guaifenesin / Dextromethorphan) is a combination medicine. Guaifenesin is an expectorant that breaks up and thins out mucus. Dextromethorphan is a cough suppressant.

People’s experience with Robitussin DM

724reviews so far. What do you think?

Worth itNot sureNot worth it
Dosage forms
  • Liquid
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Side effect rates for Robitussin Dm (guaifenesin / dextromethorphan)

0 reports
These are side effects of Robitussin Dm (guaifenesin / dextromethorphan) reported to the FDA by people taking it, and by doctors and pharmacists.
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Risks and Warnings for Robitussin Dm (guaifenesin / dextromethorphan)

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  • People taking Robitussin Dm (Guaifenesin / Dextromethorphan) have reported nausea and vomiting. This is very rare and usually not serious. If you develop a fever with the nausea and vomiting, then talk to your doctor right away.

Common concerns from people taking Robitussin Dm (guaifenesin / dextromethorphan)

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