A drug which reduces high blood pressure is obtained from
Rouwolfia serpentina
Rouwolfia serpentina is the scientific name of sarpagandha. Its root extract contains alkaloids that are used to reduce blood pressure. Its root is bitter in taste and cooling in action. It lowers blood pressure, tranquilizes the mind, and promotes sleep. Additionally, it has many more medicinial uses like controlling fever and helping contraction of uterus during childbirth.