May 6, 2025 · Guaifenesin is an ingredient in cough and cold medicines that is used to help clear mucus or phlegm from your chest when you have had a cold or flu. Guaifenesin works by making your …

Feb 1, 2026 · Guaifenesin is used to help clear mucus or phlegm (pronounced flem) from the chest when you have congestion from a cold or flu. It works by thinning the mucus or phlegm in the lungs. …

Guaifenesin is used to treat coughs and congestion caused by the common cold, bronchitis, and other breathing illnesses. Learn about side effects, drug interactions, dosages, warnings, and more.

Apr 15, 2025 · Guaifenesin is commonly used to treat chest congestion caused by the common cold, flu, bronchitis, and other illnesses. Guaifenesin may also be used for other conditions as determined by …

Nov 18, 2025 · A common immediate-release guaifenesin dosage for adults is 200 mg to 400 mg by mouth every 4 hours as needed. A common extended-release guaifenesin dosage is 600 mg to …

Guaifenesin is available in both prescription and nonprescription products. Check the labels of all your medications to make sure you are not taking more than one product containing guaifenesin.

adults and children 12 years of age and over: 1 or 2 tablets every 12 hours. Do not exceed 4 tablets in 24 hours. QUESTIONS OR COMMENTS? You may also report side effects to this phone number.

The usual dosage of guaifenesin 600-mg extended-release tablets as an expectorant in adults and children 12 years of age and older is 600 mg or 1.2 g every 12 hours, not to exceed 2.4 g daily.

Dec 4, 2025 · Detailed Guaifenesin dosage information for adults and children. Includes dosages for Cough; plus renal, liver and dialysis adjustments.

Questions? 1-866-MUCINEX (1-866-682-4639) You may also report side effects to this phone number.