Mucinex Cold and Cough Relief 1,200 mg Strength Tablet 28 per Box - 28 Count CartonMaximum Strength Mucinex helps loosen phlegm and thin bronchial secretions to rid the bronchial passageways of bothersome mucus and make coughs more productive so you'll get well faster Maximum strength Mucinex extended release bi layer tablets contain an immediate release layer on one side and an extended release layer on the other side Each extended release bi layer tablet has 1,200 milligrams of guaifenesin There are 28 extended release bi layer