FIELD: medicine, pharmaceutics.;SUBSTANCE: invention refers to chemical-pharmaceutical industry. Ground roots are three-stage extracted by aqueous-alcoholic solutions in periodic stirring at room temperature in a dark place with the first fraction prepared by processing of raw material by an aqueous-alcoholic solution in the ratio 2:1 for 8 days, the second fraction prepared by processing of the remained roots by an aqueous-alcoholic solution in the ratio 1:1 for 6 days and the third fraction prepared by processing of the remained vegetative raw materials by an aqueous-alcoholic solution in the ratio 1:2 for 5 days; then fractions are poured out.;EFFECT: invention allows for higher yield of the end product with improved activity.;1 ex
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