Grass river car, also known as Chonglou, has the role of treating snake bites, boils (mostly occurring in the limbs or face of the sores, the shape of the small root base of the deep, such as nails as hard) carbuncle, sore throat, bruises, bruises and pain, wind (to fainting, windy, convulsions as the main manifestation of the pediatric disease) convulsions, and other conditions. Chonglou nature slightly cold, bitter flavor, can enter the liver meridian, can clear heat and detoxification (clear the body of heat and poisonous evil), swelling and pain (to eliminate swelling and pain), clinical often and burdock, root, forsythia, in order to improve the swelling and pain in the throat. It can also be used to treat poisonous snake bites by pounding fresh Chonglou and applying it to the affected area. In addition, it can be combined with yellow dock, honeysuckle and red peony to improve boils and carbuncles. Chonglou is also good at cooling the liver and calming fear, used alone or with chrysanthemums, cicadas, hook vine, can cure the convulsions of the wind. Clinically, Chonglou is also often used with Panax ginseng, natural copper, blood exhaust, etc., in order to improve the traumatic bleeding, stasis and swelling, bruises and other injuries. Chonglou has a certain degree of toxicity, the adverse effects and contraindications of taking the drug is not clear, it is recommended to use under the guidance of professional Chinese medicine practitioners.