Radix Sophorae Flavescentis. Part used: Root. Known as Pagoda Tree Root. Entering meridians: Urinary bladder, Heart, Liver, Large Intestine, Stomach and Small Intestine. Ku Shen clears heat, dries dampness, disperses wind, kills parasites, stops itching, clears heat and promotes urination. All Phoenix Medical dry authentic herbs and concentrated herbal granules are free of sulphur, herbicides and pesticides.