Study on quality control of Houttuynia Cordata, a traditional Chinese medicine by fingerprint combined with quantitative analysis of multi-components by single marker Simultaneous determination of six active constituent in different parts of Houttuyniae Herba by quantitative analysis of multi-components by single marker Optimization of preparation of volatile oil from Houttuynie Herba-β-cyclodextrin inclusion complex by central composite design-response surface method Study on dispersible tablets of Houttuyniae Herba Study on dispersible tablets of Houttuyniae Herba