Compare Delsym vs. Robitussin DM

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

Delsym
(Dextromethorphan)

Robitussin Dm
(Guaifenesin / Dextromethorphan)

Relieves coughing. Delsym (Dextromethorphan) is a good option for treating dry cough. It's not safe to take with MAO inhibitors though.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.
Find lowest prices
Powered by GoodRxSave on your next prescription. Be sure you’re getting the lowest price for your medication, even if you have insurance.
Reviews & ratings
Button Group. All currently active
Button Group. All currently active
4.487394957983193Delsym
Reviews for Delsym (Dextromethorphan)
64%
of people say Delsym (Dextromethorphan) is worth it
31%
say it works well
12%
say it's a big hassle
Reviews for Robitussin Dm (Guaifenesin / Dextromethorphan)
75%
+11% vs. Delsym (Dextromethorphan)
37%
+6% vs. Delsym (Dextromethorphan)
7%
+5% vs. Delsym (Dextromethorphan)
Side effects
DelsymRobitussin DM

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

FDA side effect reports for Delsym »

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

FDA side effect reports for Robitussin DM »
How it works
DelsymRobitussin DM
Delsym (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
DelsymRobitussin DM
Cough suppressantOver-the-counter
ExpectorantCough suppressantOver-the-counter
Available as
DelsymRobitussin DM
  • Pill
  • Liquid extended release
  • Liquid
Used for (click to learn more)
DelsymRobitussin DM
Risk factors for serious side effects
DelsymRobitussin DM
  • Using other medications that affect serotonin
Detailed Delsym (Dextromethorphan) risks & warnings »
    • Using other medications that affect serotonin
      Detailed Robitussin Dm (Guaifenesin / Dextromethorphan) risks & warnings »
      Pregnancy category
      DelsymRobitussin 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
      DelsymRobitussin DM
      • Good for treating dry cough.
      • Available in drugstores either by itself or in combination with other medications to treat cold and allergy symptoms.
      • Available as a liquid and a tablet.
      • Some products relieve cough for 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
      DelsymRobitussin DM
      • Can't take dextromethorphan if you're taking MAO inhibitors (drugs used to treat Parkinson's disease, depression, and other emotional conditions). If taken together, they will cause dangerously high blood pressure levels.
      • If you're taking this in combination with other cold and allergy medications, you should read labels closely to make sure you're not accidentally taking too much of a single ingredient.
      • 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
      DelsymRobitussin 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.
      • 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 DelsymSide effectsReviews & ratingsAlternativesFDA package insert
      More about Robitussin DMSide effectsReviews & ratingsAlternativesFDA package insert