The acute toxicity of Stephania cepharantha was studied, LD50 of aqueous extract of its wet and dry root tuber oral were 41.4 g/kg and 22.9 g/kg respectively.

• 头花千金藤急性毒性试验结果表明:其块根鲜品与干品水煎液的LD_(50)分别为41.；4g/kg和22