New Houttuyniacin Sodium is an adduct of New Houttuyniacin and Sodium Bisulfite. Since New Houttuyniacin is an oily substance, it is insoluble in water, and its solubility is increased after the addition. Sodium is easy to precipitate during the storage process in solution state, resulting in increased adverse reactions during clinical application. In addition, the new houttuyniacin sodium solution is sensitive to light, which can cause drug deterioration.