Herbal Immune Booster & Cough Syrup is a combination of herbs that work to boost the immune system and to dissolve and remove built up mucous in our throats and chest which acts as breeding grounds for many viruses and bacteria. It contains, as immune boosters, mullein, garlic, and echinacea which have shown effectiveness against colds, flus, coughs, bronchitis, and infections. As mucolytics and liquifying agents, this product has horehound, usnea, peppermint, hyssop and osha. By breaking up and dissolving mucous in our respiratory system, the body is able to cough up or digest the mucous which causes discomfort and act as a breeding for infections. The product is completed with a black cherry syrup base. This product has been in use for over 20 years to help those that just couldn't seem to shake a cold or end the stress of recurring bronchitis. All products offered here by The Drug Doctor are guaranteed or refunded if not satisfied. If you feel subject to respiratory infections and mucous producing allergies and colds, give it a try!