ISATIS, an herbal spray formula, is based on a Chinese herbal composition called CHUAN XIN LIAN KANG YAN PIAN. It is named after the two central plants in it (the "emperors" of the formula in the Chinese view). Both are different parts (root and leaves) of the same plant called ISATIS TINCTORIA. According to Chinese medical literature, these plants are intended for conditions of "heat and toxicity" - a traditional term that refers to the feeling of "burning and burning," which in some cases feels like a "thorn in the throat." How to use: Shake well before use. Spray directly into the mouth and throat and swallow. Repeat several times a day as needed. 30 ml