Mucus Relief 400 mg Caplets, 50 ct, QC95517 Sale! This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Helps loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bothersome mucus. Helps make coughs more productive. Immediate release caplets. Dye-free