Mucinex Chest Congestion, Maximum Strength 12 Hour Extended Release Tablets, 14ct, 1200 mg Guaifenesin with Extended Relief of Chest Congestion Caused by Excess Mucus, Thins and loosens MucusRelieves chest congestionThins and loosens mucus that causes chest congestionStarts to work right away & lasts for 12 hoursMaximum Strength, Extended-release bi-layer tabletNo.1 doctor recommended OTC expectorant*
