Reserpine was isolated in 1952 from the dried root of Rauwolfia serpentina (Indian snakeroot), which had been known as Sarpagandha and had been used for centuries in India for the treatment of insanity, as well as fever and snakebites. Reserpine (Lannett's Serpalan) is an indole alkaloid, antipsychotic and antihypertensive drug that has been used for the control of high blood pressure and as a tranquilizer.
Some examples of tranquilizers are: Valium (diazepam), Librium/Novopoxide (chlordiazepoxide), Halcion (triazolam), ProSom (estazolam), Xanax, Ativan, etc.