Compare Mucinex DM vs. Robitussin DM

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Breaks up mucus and relieves cough.

Mucinex Dm (Dextromethorphan / Guaifenesin) is okay for loosening congestion in your chest and throat, but it could prevent you from coughing the mucus up. It comes as an extended-release tablet and a short-acting liquid.

3.9/ 5 average rating with 15 reviewsforMucinex DM
Breaks up mucus and relieves cough.

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.

3.7/ 5 average rating with 724 reviewsforRobitussin DM
Upsides
  • Mucinex Dm (Dextromethorphan / Guaifenesin) 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 in productive and wet coughs.
  • The extended release version of Mucinex DM lasts up to 12 hours.
  • 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.
Downsides
  • Mucinex Dm (Dextromethorphan / Guaifenesin) 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 Mucinex Dm (Dextromethorphan / Guaifenesin)) stops you from coughing.
  • Can cause sleepiness, dizziness, and an upset stomach.
  • 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.
Used for
Dosage forms
  • Pill
  • Extended release
  • Liquid
  • Liquid
No pricing information available
No pricing information available
Want to save even more money?
Sign up now for a 30-day trial and save up to 95% at CVS, Kroger, Albertsons, and other pharmacies.
Reviews
15 reviews so far
73%
saidit'sworth it
73%
saiditworked well
13%
saidit'sa big hassle

Have you used Mucinex Dm (Dextromethorphan / Guaifenesin)?

Leave a review
724 reviews so far
75%
saidit'sworth it
37%
saiditworked well
7%
saidit'sa big hassle

Have you used Robitussin Dm (Guaifenesin / Dextromethorphan)?

Leave a review
Side effects
The Mucinex Dm (Dextromethorphan / Guaifenesin) FDA package insert doesn’t have numbers about how common side effects are.
The Robitussin Dm (Guaifenesin / Dextromethorphan) FDA package insert doesn’t have numbers about how common side effects are.
Risks and risk factors
  • Nausea and vomiting
  • Serotonin syndrome
    • Using other medications that affect serotonin
  • Cough warning
See more detailed risks and warnings
  • Nausea and vomiting
  • Serotonin syndrome
    • Using other medications that affect serotonin
  • Cough warning
See more detailed risks and warnings