Compare Robitussin vs. Robitussin DM

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

Robitussin (Guaifenesin)

Over-the-counter

Robitussin Dm (Guaifenesin / Dextromethorphan)

Over-the-counter

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.

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

Upsides

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.

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

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.

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.

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