Reserpine

In pharmacology, reserpine is "an alkaloid found in the roots of Rauwolfia serpentina and R. vomitoria. Reserpine inhibits the uptake of norepinephrine into storage vesicles resulting in depletion of catecholamines and serotonin from central and peripheral axon terminals. It has been used as an antihypertensive and an antipsychotic as well as a research tool..."

Hypertension
Reserpine can lower the systolic blood pressure by about 8 mm Hg. -