Andreea Raducan, the gymnast of Romanian, won the gold medal in gynmastics women's all-round competition at the Sydney 2000 Olympic games. But soon be disqualified because the positive result of pseudoephedrine at doping control. For this consequence, namy athletes start paying attention to the medicines containing ephedra alkaloids for flu. Mahuang (Ephedra) is a traditioanl Chinese medicine herb and its major medicinal components are ephedrine and pseudoephedrine. Ephedrine and pseudoephedrine are forbidden substances by IOC. The purpose of this study is to investigate what the certified Chinese herbal preparations contained Mahuang for flu. The data back of certified preparations were provided by the Department of Health, Executive Yuan, Taiwan, R.O.C. The results showed that there were eight hundreds and sixty-three concentrated Chinese Herbs containing Mahuang for flu. We classified these preparations under three categories: "recorded on traditional textbook", "experience preparations" and "named by manufacturer". The preparation numbers of three categories were 673,112 and 78, respectively. Some famous advertising preparations in television and newspaper are included in these lists. In order to avoid misusing, athletes should notice the constituents of marketing Chinese herbal preparations before administering Chinese preparations for cold.