Mucinex Maximum Strength 12-Hour Chest Congestion Expectorant Tablets (126 Count) br Click below to buy on Amazon: br Relieves chest congestion br Thins and loosens mucus that causes chest congestion br Starts to work right away and lasts for 12 hours br Extended-release bi-layer tablet br Mucinex is the 1 doctor recommended OTC expectorant among Internists General Practitioners and Family Practitioners