Compare Mucinex DM vs. Mucinex

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

Mucinex Dm
(Dextromethorphan / Guaifenesin)

Mucinex
(Guaifenesin)

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 that causes cough. Mucinex (Guaifenesin) is a useful medicine for loosening congestion in your chest and throat, and it lasts longer than other guaifenesin products.
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Reviews & ratings
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Reviews for Mucinex (Guaifenesin)
78%
10% vs. Mucinex Dm (Dextromethorphan / Guaifenesin)
47%
41% vs. Mucinex Dm (Dextromethorphan / Guaifenesin)
7%
7% vs. Mucinex Dm (Dextromethorphan / Guaifenesin)
Side effects
Mucinex DMMucinex

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 Mucinex side effects.

FDA side effect reports for Mucinex »
How it works
Mucinex DMMucinex
Mucinex Dm (Dextromethorphan / Guaifenesin) is a combination medicine. Guaifenesin is an expectorant that breaks up and thins out mucus. Dextromethorphan is a cough suppressant.Mucinex (Guaifenesin) is an expectorant. It contains guaifenesin, which thins and loosens mucus, making it easier to cough out.
Type of medication
Mucinex DMMucinex
Cough suppressantExpectorantOver-the-counter
ExpectorantOver-the-counter
Available as
Mucinex DMMucinex
  • Pill
  • Extended release
  • Liquid
  • Extended release
  • Liquid
Used for (click to learn more)
Mucinex DMMucinex
Risk factors for serious side effects
Mucinex DMMucinex
    • Using other medications that affect serotonin
      Detailed Mucinex Dm (Dextromethorphan / Guaifenesin) risks & warnings »
        Detailed Mucinex (Guaifenesin) risks & warnings »
        Pregnancy category
        Mucinex DMMucinex
        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.
        • Mucinex (Guaifenesin) is alcohol- and sugar-free.
        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 DMMucinex
        • 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.
        • Mucinex (Guaifenesin) reduces the thickness and amount of mucus in your throat and chest.
        • Lasts longer than some other products that contain guaifenesin, such as Robitussin, because it's an extended-release form.
        • It’s available at the drugstore either by itself or in combination with other medications to treat cold and flu symptoms.
        • Available in liquid and tablet forms.
        • Mucinex (Guaifenesin) is alcohol- and sugar-free.
        Downsides and risks
        Mucinex DMMucinex
        • 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.
        • Mucinex (Guaifenesin) is more expensive than other medications that treat congestion.
        • You need to drink a lot of fluids while taking this medication or it won't work as well.
        • Mucinex (Guaifenesin) isn’t useful if you have a dry cough.
        • Can cause nausea, headache, and an upset stomach.
        Tips from our pharmacists for people taking the medication
        Mucinex DMMucinex
        • 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 Mucinex (Guaifenesin) because liquid helps break down mucus.
        • Steam from a humidifier, cool mist vaporizer, or hot shower can also help add moisture to your airways.
        • Follow age-specific dosing instructions on how much to take.
        • Mucinex (Guaifenesin) only works for coughs with mucus, so don't use it if you have a dry cough.
        • If your cough lasts more than 7 days, call your doctor.
        Learn more
        More about Mucinex DMSide effectsReviews & ratingsAlternativesFDA package insert
        More about MucinexSide effectsReviews & ratingsAlternativesFDA package insert