【摘要】 白花前胡石油醚提取物能抑制乙酰胆碱和氯化钾所致气管平滑肌收缩，而且能使乙酰胆碱收缩气管平滑肌的量效曲线右移，使最大反应降低，其作用为剂量依赖性。更多还原

【Abstract】 he contractions of isolated rabbit trachea smooth muscles by acetylcholine and potassium chIoride were atten。uated by petroleum ether extract of Peucedanum praeruptorum pretreatment. The dose-effect curve of acetylcholinevvas shifted to the right,and the maximal response was diminished. The effect was non-competitive and dosed-depen。dent。更多还原