Compare Robitussin DM vs. Mucinex DM

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

Robitussin Dm (Guaifenesin / Dextromethorphan)

Over-the-counter

Mucinex Dm (Dextromethorphan / Guaifenesin)

Over-the-counter

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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3.7/ 5 average rating with 724 reviewsforRobitussin DM

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.

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3.9/ 5 average rating with 15 reviewsforMucinex DM

Upsides

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.

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.

Downsides

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.

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.

Used for