The main component of Huachansu is the extract of dried toad skin. Its injection is a light yellow or light yellow clear liquid, and its indications include detoxification, decongestion and pain relief, and it is generally used in middle and late stage tumors and chronic viral hepatitis B. The adverse reactions often include chills and fever, and a few patients have local irritation or phlebitis after long-term intravenous drip, resulting in slowing down the drip rate, and very few patients may also develop urticaria dermatitis. If the above-mentioned adverse reactions occur, the drug should be stopped immediately and symptomatic treatment should be done, and the drug can be used normally after the reactions disappear. Avoid using it in combination with drugs that excite the heart violently.