Bovine yellow is the dried gallstones of cows, which are taken out from their bodies. When a cow is slaughtered, if it is found to have ox-huang in its body, it only needs to be filtered out of the bile, remove the external membrane, and dried in the shade to obtain ox-huang. Niu Huang is a traditional Chinese medicine, its medicinal properties of cool, not only into the liver meridian and heart meridian, clearing the heart, cooling the liver, but also good at removing phlegm, opening the orifices, and resting the wind, detoxification, this medicine is often used in fever, dizziness (due to the heat of the evil spirits caused by the exuberance of the dizziness), phlegmatic stroke, epilepsy, madness, mouth and tongue sores and other diseases. Niu Huang is often combined with other traditional Chinese medicines to make An Gong Niu Huang Pills, Niu Huang Wake Up Pills, Niu Huang Shang Qing Pills and other proprietary Chinese medicines for use, and can also be combined with pearls, cinnabar, water buffalo horn, frankincense and other traditional Chinese medicines to make bulk preparations for use. The adverse effects of this product are not clear, and pregnant women should be cautious of using Niu Huang. Niuhuang is a traditional Chinese medicine and should not be used indiscriminately. If you need to use the medicine, you must be guided by a professional Chinese medicine practitioner.