Ground: about 20 g (6 tablespoons) of celandine grass are placed in a glass or enamel ware, pour 200 ml (1 glass) of hot boiled water, cover with a lid and heat in a boiling water bath for 15 minutes, cool at room temperature for 45 minutes, filter through a double layer gauze, the remaining raw material is squeezed. The volume of the infusion obtained is adjusted to 200 ml with boiled water.