Guaifenesin (Oral Route)Drug Information provided by: Micromedex
US Brand Names
Canadian Brand Names
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.
This medicine is available both over-the-counter (OTC) and with your doctor's prescription.
Do not give any over-the-counter (OTC) cough and cold medicine to a baby or child under 4 years of age. Using these medicines in very young children might cause serious or possibly life-threatening side effects .