Compare Mucinex DM vs. Nyquil Cold And Flu

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

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.

3.9/ 5 average rating with 15 reviewsforMucinex DM
Relieves cold and flu symptoms, and helps you sleep.

Nyquil Cold And Flu (Acetaminophen / Dextromethorphan / Doxylamine) is a useful combination medicine that relieves cold and flu symptoms and will help you sleep. Make sure you really need all of its ingredients.

3.8/ 5 average rating with 1188 reviewsforNyquil Cold And Flu
Upsides
  • 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.
  • Nyquil Cold And Flu (Acetaminophen / Dextromethorphan / Doxylamine) is a combination medicine that relieves multiple cold symptoms. It's good to use if you have watery eyes, a cough, fever, and pain.
  • The cough medicine (dextromethorphan) works well and has very few side effects.
  • The pain reliever (acetaminophen) is easier on your stomach and has fewer drug interactions than other pain medications like aspirin or ibuprofen.
  • The antihistamine (doxylamine) will help you sleep.
Downsides
  • 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.
  • If you don't really need all of the medications in this combination, you're taking extra medicine and might have extra side effects for no reason.
  • You shouldn't use it if you have high blood pressure.
  • To avoid hurting your liver, you have to keep track of the total amount of acetaminophen (APAP) you're taking since it's a very common ingredient in pain and cold/flu combination medicines.
Used for
Dosage forms
  • Pill
  • Extended release
  • Liquid
  • Pill
  • Liquid
No pricing information available
No pricing information available
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Reviews
15 reviews so far
73%
saidit'sworth it
73%
saiditworked well
13%
saidit'sa big hassle

Have you used Mucinex Dm (Dextromethorphan / Guaifenesin)?

Leave a review
1188 reviews so far
83%
saidit'sworth it
42%
saiditworked well
7%
saidit'sa big hassle

Have you used Nyquil Cold And Flu (Acetaminophen / Dextromethorphan / Doxylamine)?

Leave a review
Side effects
The Mucinex Dm (Dextromethorphan / Guaifenesin) FDA package insert doesn’t have numbers about how common side effects are.
The Nyquil Cold And Flu (Acetaminophen / Dextromethorphan / Doxylamine) FDA package insert doesn’t have numbers about how common side effects are.
Risks and risk factors
  • Nausea and vomiting
  • Serotonin syndrome
    • Using other medications that affect serotonin
  • Cough warning
See more detailed risks and warnings
  • Liver damage
    • Drinking more than 2 alcoholic beverages a day
    • Taking with other Tylenol-containing medicines
    • History of liver disease
  • Serotonin syndrome
    • Using other medications that affect serotonin
  • Driving impairment
    • Taking with alcohol
    • Taking with other medicines that make you less alert
  • Antihistamine side effects
    • Age 65 years or older
    • Glaucoma
    • Benign prostatic hypertrophy (BPH)
See more detailed risks and warnings