Compare Robitussin vs. Robitussin DM

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

Robitussin
(Guaifenesin)

Robitussin Dm
(Guaifenesin / Dextromethorphan)

Breaks up mucus that causes cough. Robitussin (Guaifenesin) is a useful medicine for loosening congestion in your chest and throat, but it doesn't last as long as other guaifenesin products.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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Have you used Robitussin (Guaifenesin)?
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Reviews for Robitussin DM
75%
+25% better vs. Robitussin
37%
+3% better vs. Robitussin
7%
+7% better vs. Robitussin
724 reviews
Have you used Robitussin Dm (Guaifenesin / Dextromethorphan)?
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Side effects
RobitussinRobitussin DM

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

FDA side effect reports for Robitussin »

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

FDA side effect reports for Robitussin DM »
How it works
RobitussinRobitussin DM
Robitussin (Guaifenesin) is an expectorant. It contains guaifenesin, which thins and loosens mucus, making it easier to cough out.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
RobitussinRobitussin DM
Over-the-counterLower-cost generic availableOver-the-counterLower-cost generic available
Available as
RobitussinRobitussin DM
  • Liquid
  • Liquid
Used for
RobitussinRobitussin DM
Risk factors for serious side effects
RobitussinRobitussin DM
    Detailed Robitussin (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
    RobitussinRobitussin DM
    • Robitussin (Guaifenesin) reduces the thickness and amount of mucus in your throat and chest.
    • It’s available at the drugstore either by itself or in combination with other medications to treat cold and flu symptoms.
    • Available in multiple forms.
    • Can be used in children 12 years and older.
    • 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
    RobitussinRobitussin DM
    • Robitussin (Guaifenesin) doesn't last as long as other products that contain guaifenesin. Mucinex's extended release form lasts 12 hours and Robitussin (Guaifenesin)'s lasts 8 hours.
    • You need to drink a lot of fluids while taking this medication or it won't work as well.
    • Robitussin (Guaifenesin) isn’t useful if you have a dry cough.
    • Can cause nausea, headache, 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
    RobitussinRobitussin DM
    • Drink plenty of fluids while taking Robitussin (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.
    • If your cough lasts more than 7 days, call your doctor.
    • Robitussin (Guaifenesin) only works for coughs with mucus, so don't use it if you have a dry cough.
    • 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 RobitussinSide effectsReviews & ratingsAlternativesFDA package insert
    Have you used Robitussin (Guaifenesin)?
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    More about Robitussin DMSide effectsReviews & ratingsAlternativesFDA package insert
    Have you used Robitussin Dm (Guaifenesin / Dextromethorphan)?
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