Compare Mucinex vs. Robitussin

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

Mucinex
(guaifenesin)

Robitussin
(guaifenesin)

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.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.
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Reviews & ratings
Filter group. All currently selected
Filter group. All currently selected
5.22Mucinex
Reviews for Mucinex (guaifenesin)
78%
of people (All ages) say Mucinex (guaifenesin) is worth it
47%
say it works well
7%
say it's a big hassle
902 reviews
Have you used Mucinex (guaifenesin)?
Worth itNot sureNot worth it
Reviews for Robitussin (guaifenesin)
Not enough review data. Review it!
+22% better vs. Mucinex (guaifenesin)
Not enough review data. Review it!
-7% worse vs. Mucinex (guaifenesin)
Not enough review data. Review it!
+7% better vs. Mucinex (guaifenesin)
Have you used Robitussin (guaifenesin)?
Worth itNot sureNot worth it
Side effects
MucinexRobitussin

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

FDA side effect reports for Mucinex »

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

FDA side effect reports for Robitussin »
How it works
MucinexRobitussin
Mucinex (Guaifenesin) is an expectorant. It contains guaifenesin, which thins and loosens mucus, making it easier to cough out.Robitussin (Guaifenesin) is an expectorant. It contains guaifenesin, which thins and loosens mucus, making it easier to cough out.
Type of medication
MucinexRobitussin
Over-the-counter
Over-the-counter
Available as
MucinexRobitussin
  • Extended release
  • Liquid
  • Liquid
Used for
MucinexRobitussin
Risk factors for serious side effects
MucinexRobitussin
    Detailed Mucinex (guaifenesin) risks & warnings »
      Detailed Robitussin (guaifenesin) 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.

      Alcohol
      MucinexRobitussin
      • Mucinex (Guaifenesin) is alcohol- and sugar-free.
      No alcohol related info.
      Upsides and benefits
      MucinexRobitussin
      • 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.
      • 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.
      Downsides and risks
      MucinexRobitussin
      • 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.
      • 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.
      Tips from our pharmacists for people taking the medication
      MucinexRobitussin
      • 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.
      • If your cough lasts more than 7 days, call your doctor.
      • Mucinex (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 (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.
      Learn more
      More about MucinexSide effectsReviews & ratingsAlternativesFDA package insert
      Have you used Mucinex (guaifenesin)?
      Worth itNot sureNot worth it
      More about RobitussinSide effectsReviews & ratingsAlternativesFDA package insert
      Have you used Robitussin (guaifenesin)?
      Worth itNot sureNot worth it