Guaifenesin is an expectorant that helps.

Webdec 6, 2023 · mucinex d and mucinex dm both contain the expectorant guaifenesin (which is contained as a single ingredient in mucinex).

• combines two medications in a single product for convenience.

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• helps with stuffy nose, chest and sinus congestion, and wet cough.

• available over the.

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