利血平（英语：Reserpine），或作利舍平，蛇根碱，是一种用于治疗高血压及精神病的吲哚类生物碱药物，最初是在萝芙木属植物蛇根木中提取而成。如今由于副作用较多并且更优的新药上市，利血平已不再是治疗的首选药物。儿茶酚胺类（属于单胺类神经递质）在对心率、心肌收缩力和外周阻力的调控上起着极大作用，利血平的降压作用是通过消耗外周交感神经末梢的儿茶酚胺而发挥药效。

Reserpine (also known by trade names Raudixin, Serpalan, Serpasil) is an indole alkaloid, antipsychotic, and antihypertensive drug that has been used for the control of high blood pressure and for the relief of psychotic symptoms, although because of the development of better drugs for these purposes and because of its numerous side-effects, it is rarely used today. 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.