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Meds & supplements  ›  Guaifenesin

Medicine · Expectorant

Guaifenesin

Uses: temporarily relieves cough due to minor throat and bronchial irritation as may occur with a cold helps loosen phlegm (mucus) and thin bronchial secretions to drain bronchial tubes.

Drug FactsLabel updated 2024-07-25

Selected manufacturer label information, organised into consistent sections by Sofidex. Read the full label at DailyMed ↗

Drug facts

Used for
Uses: temporarily relieves cough due to minor throat and bronchial irritation as may occur with a cold helps loosen phlegm (mucus) and thin bronchial secretions to drain bronchial tubes.
How to take it
adults and children 12 years of age and older: take 1 tablet every 4 hours with a full glass of water while symptoms persist.

What it is used for

Uses

  • helps loosen phlegm (mucus) and thin bronchial secretions to make coughs more productive to rid the bronchial passageway of bothersome mucus

How to take it

Directions

  • adults and children 12 years of age and older: take 1 tablet every 4 hours with a full glass of water while symptoms persist. Do not exceed 6 doses in 24 hours.
  • children under 12 years of age: do not use

Warnings

Warnings

Ask a doctor before use if you have

  • persistent or chronic cough such as occurs with smoking, asthma, chronic bronchitis, or emphysema
  • cough accompanied by excessive phlegm (mucus)

When using this product

  • do not exceed recommended dosage
  • do not use for more than 7 days

Stop use and ask a doctor if

  • cough lasts for more than 7 days, recurs, or is accompanied by fever, rash, or persistent headache. These could be signs of a serious condition.

If pregnant or breast-feeding, ask a healthcare professional before use.

Keeping it away from children

Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center (1-800-222-1222) right away.

Active ingredient

Active ingredient (in each immediate-release tablet)

Guaifenesin 400 mg

Cite this page

NLM

sofidex [Internet]. Daloreum; c2026. Guaifenesin; [reviewed 2026 Aug 2; cited 2026 Nov 10]. Available from: https://sofidex.com/patients/medicines/guaifenesin

APA 7th

sofidex. (2026, August 2). Guaifenesin. Daloreum. Retrieved November 10, 2026, from https://sofidex.com/patients/medicines/guaifenesin

AMA 11th

Guaifenesin. sofidex. Reviewed August 2, 2026. Accessed November 10, 2026. https://sofidex.com/patients/medicines/guaifenesin

The cited date is today’s, because a citation records when you read the page. The reviewed date is when a clinician last checked it.