Nin Jiom Pei Pa Koa - Sore Throat Syrup - 100% Natural (Honey Loquat Flavored) (10 Fl. Oz. - 300 Ml.)
A study at the China Academy of Traditional Chinese Medicine published in a 1994 article, "Pharmacological studies of nin jion pei pa koa", indicated that Pei Pa Koa had significant effect on relieving coughs, removing sputum, relieving asthma in vivo and in vitro.