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Guaifenesin ER

Generic Mucinex
Guaifenesin ER

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Price with free coupon

$
5.79
Retail: $9.87

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GoodRx coupon prices last updated on 01/23/26.

Sales tax may apply and is not included.

About guaifenesin ER

prescription bottle
DEXTROMETHORPHAN; GUAIFENESIN treats the symptoms of the common cold, allergies, or flu. It works by reducing cough and loosening mucus. It is a combination of a cough suppressant and an expectorant.

Get Guaifenesin ER for as low as $5.79, which is 51% off the average retail price of $11.80 for the most common version, by using a GoodRx coupon.

Other Expectorants

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Cough

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