In 1931, Gananath Sen and Kartick Chandra Bose reported on the use of an alkaloid extract from the Rauwolfia serpentina plant in the treatment of hypertension and "insanity with violent maniacal symptoms." They noted that dosages "of 20 to 30 grains of the powder twice daily produce not only a hypnotic effect but also a reduction of blood pressure and violent symptoms
