Process for the gentle recovery of extract fractions from hypericum, pharmaceutical preparations containing the same and their use

摘要

A method of preparing an extract fraction of Hypericum perforatum L by preparing an aqueous ethanolic extract of Hypericum perforatum L, concentrating the extract to a predetermined degree by evaporation thus forming a precipitate and a supernatant, repeating the concentrating and separating steps at least once with the supernatant, optionally redissolving the separated precipitate obtained in a previous step and obtaining a product extract of Hypericum perforatum L from one of the supernatant or the precipitate of the step wherein the precipitate and supernatant are formed or the redissolved precipitate of the proceeding step.