The flavonoids are important and main compositions in the injection made from Sarcandrae glabra.The research results expressed that the flavonoids were measured in the injection are stable after place three years and flavonoids average lower 0.86% annually and lower 0.82% after heating put out germ.The strong light shooting for 30 hours can make the flavonoids descend average 9.91%.The flavonoids in the injection are the most stable in pH 4~6.In the factors to influence stability of the injection,pH influen...