Guaifenesin: What to Know Before You Take It
Also sold as Mucinex
What Guaifenesin Is Used For
Uses ■ helps loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bothersome mucus and make coughs more productive
Warnings
Warnings Do not use ■ for children under 12 years of age
Most-Reported Side Effects
Based on 199,480 reports in the FDA Adverse Event Reporting System (FAERS). Reports do not prove the drug caused the effect.
Explore full Guaifenesin safety data in our free FDA Safety Explorer
FDA Recalls (showing 12 of 17)
Superpotent; sodium benzoate preservative
Recalling firm: PAI Holdings, LLC. dba Pharmaceutical Associates Inc
CGMP Deviations: Released product should have been rejected.
Recalling firm: LNK International, Inc.
Crystallization: Lack of uniformity - a change in texture, chunky, grainy, and small crystal substances inside the bottles.
Recalling firm: Denison Pharmaceuticals, LLC
Crystallization: Lack of uniformity - a change in texture, chunky, grainy, and small crystal substances inside the bottles.
Recalling firm: Denison Pharmaceuticals, LLC
Product mix-up: incorrect product was found inside the G-Supress DX product carton.
Recalling firm: Novis PR, LLC dba Kramer Novis
Boxes mislabeled to read "Decongestant Free", but the product contains Phenylephrine HCI 5mg
Recalling firm: LNK International, Inc.
Microbial Contamination of Non-Sterile Products
Recalling firm: Efficient Laboratories, Inc.
Microbial Contamination of Non-Sterile Products
Recalling firm: Efficient Laboratories, Inc.
Microbial Contamination of Non-Sterile Products
Recalling firm: Efficient Laboratories, Inc.
Microbial Contamination of Non-Sterile Products
Recalling firm: Efficient Laboratories, Inc.
Defective Delivery System: the dosing cups are missing graduations applicable to certain age groups.
Recalling firm: Glaxosmithkline Consumer Healthcare Holdings
CGMP Deviations: products were manufactured with lack of process validation, cleaning validation, stability studies, and other current good manufacturing practice violations.
Recalling firm: Pharma-Natural Inc.
This information is educational — not medical advice.
This page is provided for general educational purposes and summarizes publicly available data from sources such as the U.S. Food & Drug Administration. It is not a substitute for the judgment of a licensed clinician and should not be used to start, stop, or change any medication. It may be incomplete or out of date, and individual circumstances vary. Always talk with your prescriber or pharmacist about your specific medications and health conditions. If you think you may have a medical emergency, call 911.