Compare Mucinex DM vs. Robitussin DM

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

Mucinex Dm
(dextromethorphan / guaifenesin)

Robitussin Dm
(guaifenesin / dextromethorphan)

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.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.
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Reviews & ratings
Filter group. All currently selected
Filter group. All currently selected
5.4Mucinex DM
Reviews for Mucinex Dm (dextromethorphan / guaifenesin)
73%
of people (All ages) say Mucinex Dm (dextromethorphan / guaifenesin) is worth it
73%
say it works well
13%
say it's a big hassle
Have you used Mucinex Dm (dextromethorphan / guaifenesin)?
Worth itNot sureNot worth it
Reviews for Robitussin Dm (guaifenesin / dextromethorphan)
75%
+2% better vs. Mucinex Dm (dextromethorphan / guaifenesin)
37%
-36% worse vs. Mucinex Dm (dextromethorphan / guaifenesin)
7%
+6% better vs. Mucinex Dm (dextromethorphan / guaifenesin)
724 reviews
Have you used Robitussin Dm (guaifenesin / dextromethorphan)?
Worth itNot sureNot worth it
Side effects
Mucinex DMRobitussin DM

We haven’t found good data for Mucinex DM side effects.

FDA side effect reports for Mucinex DM »

We haven’t found good data for Robitussin DM side effects.

FDA side effect reports for Robitussin DM »
How it works
Mucinex DMRobitussin DM
Mucinex Dm (Dextromethorphan / Guaifenesin) is a combination medicine. Guaifenesin is an expectorant that breaks up and thins out mucus. Dextromethorphan is a cough suppressant.Robitussin Dm (Guaifenesin / Dextromethorphan) is a combination medicine. Guaifenesin is an expectorant that breaks up and thins out mucus. Dextromethorphan is a cough suppressant.
Type of medication
Mucinex DMRobitussin DM
Over-the-counter
Over-the-counter
Available as
Mucinex DMRobitussin DM
  • Pill
  • Extended release
  • Liquid
  • Liquid
Used for
Mucinex DMRobitussin DM
Risk factors for serious side effects
Mucinex DMRobitussin DM
  • Using other medications that affect serotonin
Detailed Mucinex Dm (dextromethorphan / guaifenesin) risks & warnings »
  • Using other medications that affect serotonin
Detailed Robitussin Dm (guaifenesin / dextromethorphan) risks & warnings »
Pregnancy

The FDA hasn’t classified this medicine’s effects on unborn babies. Talk with your doctor about this medicine if you’re pregnant or planning on it.

The FDA hasn’t classified this medicine’s effects on unborn babies. Talk with your doctor about this medicine if you’re pregnant or planning on it.

Upsides and benefits
Mucinex DMRobitussin DM
  • 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 and risks
Mucinex DMRobitussin DM
  • 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.
Tips from our pharmacists for people taking the medication
Mucinex DMRobitussin DM
  • Cough suppressant starts working in 15 to 30 minutes.
  • Follow age-specific dosing instructions on how much to take. Don't take more than the recommended dose.
  • Drink plenty of fluids while taking Mucinex Dm (Dextromethorphan / Guaifenesin) because liquid helps break down mucus.
  • If your cough lasts more than 7 days, call your doctor.
  • Drink plenty of fluids while taking Robitussin Dm (Guaifenesin / Dextromethorphan) because liquid helps break down mucus.
  • Cough suppressant starts working in 15 to 30 minutes.
  • Follow age-specific dosing instructions on how much to take. Don't take more than the recommended dose.
  • If your cough lasts more than 7 days, call your doctor.
Learn more
More about Mucinex DMSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Mucinex Dm (dextromethorphan / guaifenesin)?
Worth itNot sureNot worth it
More about Robitussin DMSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Robitussin Dm (guaifenesin / dextromethorphan)?
Worth itNot sureNot worth it