Mucinex-D 12-Hour Maximum Strength provides powerful relief from nasal congestion, sinus congestion, runny nose, and sinus pressure. Each extended-release bi-layer tablet contains 1,200 mg of Guaifenesin and 120 mg of Pseudoephedrine HCl, delivering 12 hours of continuous symptom relief. This medication helps thin and loosen mucus while reducing nasal and sinus congestion, allowing you to breathe more freely day and night.

The bi-layer tablet technology provides immediate and extended relief, making it effective for both daytime and nighttime use. The extended-release formula means you only need to take one tablet every 12 hours, with a maximum of two tablets in 24 hours. This product is suitable for adults and children 12 years and older.

Active ingredients per tablet: Guaifenesin 1,200 mg (expectorant), Pseudoephedrine HCl 120 mg (nasal decongestant). Take with a full glass of water. Do not crush, chew, or break the tablet. Can be taken with or without food. Not for children under 12 years of age. HSA/FSA eligible expense. Because this medication contains pseudoephedrine, it is available only behind the pharmacy counter at Costco warehouses and is not available for online purchase or delivery.