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
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Reviews for Robitussin Dm (Guaifenesin / Dextromethorphan)
75%
13% vs. Mucinex Dm (Dextromethorphan / Guaifenesin)
37%
51% vs. Mucinex Dm (Dextromethorphan / Guaifenesin)
7%
7% vs. Mucinex Dm (Dextromethorphan / Guaifenesin)
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
Cough suppressantExpectorantOver-the-counter
ExpectorantCough suppressantOver-the-counter
Available as
Mucinex DMRobitussin DM
  • Pill
  • Extended release
  • Liquid
  • Liquid
Used for (click to learn more)
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 category
          Mucinex DMRobitussin DM
          NFDA pregnancy category (Unknown)

          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.

          See the FDA package insert
          NFDA pregnancy category (Unknown)

          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.

          See the FDA package insert
          Alcohol
          No specific alcohol-related info.No specific alcohol-related info.
          Food
          No specific food-related info.No specific food-related info.
          Kidneys and liver
          No specific kidneys and liver-related info.No specific kidneys and liver-related info.
          Sex
          No specific sex-related info.No specific sex-related info.
          Sleep
          No specific sleep-related info.No specific sleep-related info.
          Weight
          No specific weight-related info.No specific weight-related info.
          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
          • Drink plenty of fluids while taking Mucinex Dm (Dextromethorphan / Guaifenesin) 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.
          • 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
          More about Robitussin DMSide effectsReviews & ratingsAlternativesFDA package insert