查來的：利血平的降壓作用是通過消耗外周交感神經末梢的兒茶酚胺而發揮藥效

The antihypertensive actions of reserpine are a result of its ability to deplete catecholamines (among other monoamine neurotransmitters) from peripheral sympathetic nerve endings. These substances are normally involved in controlling heart rate, force of cardiac contraction and peripheral vascular resistance.