Mucinex DM

Mucinex DM treats chest congestion and cough. Take with a full glass of water.

Mucinex DM Overview


Mucinex DM is an over the counter medication used to control cough and loosen chest congestion in adults and children 12 years of age and older.

It is a single product containing 2 ingredients: Guaifenesin and Dextromethorphan.

Guaifenesin belongs to a group of drugs called expectorants. These work by thinning the mucus in the air passages to make it easier to cough up the mucus and clear the airways. 

Dextromethorphan belongs to a group of drugs called cough suppressants. These work by decreasing activity in the part of the brain that causes coughing.

This medication comes in tablet and is taken twice daily with plenty of water.

Common side effects of Mucinex DM include dizziness, lightheadedness, and nervousness.


Patient Ratings for Mucinex DM

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What are you taking Mucinex DM for?

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  • Other
  • Bronchitis
  • Common Cold
  • Cough
  • Laryngitis
  • Pharyngitis
  • Rhinitis, Allergic, Perennial
  • Sinusitis
  • Whooping Cough

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  • A couple weeks
  • A month or so
  • A few months
  • A year or so
  • Two years or more

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Mucinex DM consists of multiple generic medications. The generic medications are listed below.


For more information on this medication choose from the list of selections below.


For more information on this medication choose from the list of selections below.

Mucinex DM Drug Class

Mucinex DM is part of the drug class: