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Allergy, cough & cold

Guaifenesin

Guaifenesin is a covered generic medication on Tab's $0 list. Here's what it's used for, typical dosing, and side effects, sourced from FDA-approved drug labeling.

$0 with active Tab membership Oral Expectorant [EPC]

What it's used for

Guaifenesin helps loosen phlegm and thin bronchial secretions to clear mucus from the bronchial passageways and make coughs more productive.

Source: U.S. FDA-approved prescribing information (openFDA).

Typical dosing

Adults and children 12 years and older should take 1 tablet every 12 hours with a full glass of water, without exceeding 2 tablets in 24 hours.

Dosing shown here is the general FDA-labeled range. Your prescribing clinician determines the exact dose, form, and schedule for you — this is not a substitute for medical advice.

Boxed warning / key safety info

Do not use this product in children under 12 years of age.

Common side effects

See full FDA prescribing information for the complete adverse reaction profile.

Covered strengths on the Tab $0 list

Guaifenesin 600mg ER Tablet

Covered at $0 with an active Tab membership when filled at a participating pharmacy nationwide or through mail order. A licensed clinician must prescribe the medication.

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Other allergy, cough & cold medications covered at $0 with an active Tab membership.

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Tab is a membership and prescription-discount program—not insurance, and not a substitute for it. $0 pricing applies to medications on the current covered generic list with active membership, at participating pharmacy locations nationwide or through mail order, and is subject to change. Mail-order home delivery is preferred for recurring prescriptions; activation, availability, and delivery timing apply. This page is for general reference, drawn from FDA-approved drug labeling, and is not medical advice. Only a licensed clinician can determine if a medication is right for you.