» Powdered Rauwolfia Serpentina is Rauwolfia Serpentina reduced to a fine or a very fine powder, and adjusted, if necessary, to conform to the requirements for reserpine-rescinnamine group alkaloids by admixture with lactose or starch or with a powdered rauwolfia serpentina containing a higher or lower content of these alkaloids. It contains not less than 0.15 percent and not more than 0.20 percent of reserpine-rescinnamine group alkaloids, calculated as reserpine.