Today, kudzu is used to treat alcoholism and to reduce symptoms of alcohol hangover, including headache, upset stomach, dizziness, and vomiting. The root is used to prevent excessive consumption, while the flower is supposed to detoxify the liver and alleviate the symptoms afterwards. Kudzu contains two isoflavones called daidzin and daidzein, which when taken orally may reduce the cravings for alcohol by influencing areas of the central nervous system that controls the desire for alcohol. Kudzu is also used for heart and circulatory problems, including high blood pressure, irregular heartbeat, and chest pain. It is used for upper respiratory problems, including sinus infections, the common cold, hay fever, flu, and swine flu; the roots are used as a demulcent and refrigerant in fevers.