Compare Mucinex DM vs. Delsym

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

Mucinex Dm
(Dextromethorphan / Guaifenesin)

Delsym
(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.Relieves coughing. Delsym (Dextromethorphan) is a good option for treating dry cough. It's not safe to take with MAO inhibitors though.
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.
No pricing data for this drug at this filter setting. Try searching onGoodRx
Reviews & ratings
Filter group. All currently selected
Filter group. All currently selected

Not enough reviews for this drug. Help someone out, leave a review!

Have you used Mucinex Dm (Dextromethorphan / Guaifenesin)?
Worth itNot sureNot worth it
Reviews for Delsym (Dextromethorphan)
63%
-10% worse vs. Mucinex Dm (Dextromethorphan / Guaifenesin)
32%
-41% worse vs. Mucinex Dm (Dextromethorphan / Guaifenesin)
12%
+1% better vs. Mucinex Dm (Dextromethorphan / Guaifenesin)
127 reviews
Have you used Delsym (Dextromethorphan)?
Worth itNot sureNot worth it
Side effects
Mucinex DMDelsym

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 Delsym side effects.

FDA side effect reports for Delsym »
How it works
Mucinex DMDelsym
Mucinex Dm (Dextromethorphan / Guaifenesin) is a combination medicine. Guaifenesin is an expectorant that breaks up and thins out mucus. Dextromethorphan is a cough suppressant.Delsym (Dextromethorphan) is a cough suppressant.
Type of medication
Mucinex DMDelsym
Over-the-counter
Over-the-counter
Available as
Mucinex DMDelsym
  • Pill
  • Extended release
  • Liquid
  • Pill
  • Liquid extended release
Used for
Mucinex DMDelsym
Risk factors for serious side effects
Mucinex DMDelsym
    • Using other medications that affect serotonin
      Detailed Mucinex Dm (Dextromethorphan / Guaifenesin) risks & warnings »
      • Using other medications that affect serotonin
      Detailed Delsym (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
      Mucinex DMDelsym
      • 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.
      • 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.
      Downsides and risks
      Mucinex DMDelsym
      • 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.
      • 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.
      Tips from our pharmacists for people taking the medication
      Mucinex DMDelsym
      • 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.
      • 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
      Have you used Mucinex Dm (Dextromethorphan / Guaifenesin)?
      Worth itNot sureNot worth it
      More about DelsymSide effectsReviews & ratingsAlternativesFDA package insert
      Have you used Delsym (Dextromethorphan)?
      Worth itNot sureNot worth it