ANTIVIRAL POWDER, ANTIVIRAL EXTRACT, AND PHARMACEUTICAL PREPARATION CONTAINING SAID POWDER AND/OR SAID EXTRACT

摘要

An antiviral powder originating in a medicinal plant having an antiviral activity is prepared by rapidly heating the plant immediately after being harvested to deprive the same of the enzymatic activity, drying the deactivated plant at low temperature, and pulverizing the same after the rapid heating or low-temperature drying. An antiviral extract is prepared by extracting the powder with hot water or a lower alcohol. A pharmaceutical preparation containing the powder and the extract each in an effective dose is utilized especially as a powder. Examples of the medicinal plant include young leaves of lacquer tree and flowers of Japanese elm.