Children's Mucus Relief Expectorant Liquid, Grape Flavor, 4 oz, QC95773 Sale! This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Compare to the Active Ingredient in Children's Mucinex. Helps loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bothersome mucus and make coughs more productive Dosing cup included. Alcohol-free Grape flavor.