Expectorant, Clear Upper Respiratory Ducts. Cough-Off Herb Tea is made of wild platycodon root, loquat leaf and other precious herbs. They provide saponin, sitosterol, pladycodigenin, eriocitrin, polygalacic acid, oleanolic acid, ursolic acid, amygadalin, vitamin B, etc. Tradition Chinese medicine uses them as expectorant to moisten and clear the lung and upper respiratory ducts and maintain healthy lung and bronchial functions. Caffeine-free.