METHODS: After mixed decoction of Aristolochia Fangchi with Liuwei dihuang pill,the content of Aristolochhia acid A was determined by HPLC and the content change was observed.

• 方法:广防己与六味地黄丸共煎后,用反相高效液相色谱法测定马兜铃酸A的含量,并观测含量的变化情况。