FIELD: nanotechnologies.SUBSTANCE: invention relates to the field of nanotechnology, in particular to a process for the preparation of nanocapsules, and describes a method for preparing the Dorogov antiseptic stimulant nanocapsules of the 2nd fraction (DAS) in a shell of sodium alginate. Process is characterized in that the DAS of the 2nd fraction is slowly added to a slurry of sodium alginate in butanol with stirring at 1,300 rpm, then methylene chloride is added, the resulting residuum is filtered and dried at room temperature, the core:shell mass ratio being 1:1, 1:3 or 3:1, respectively.EFFECT: method provides a simplification and acceleration of the process of obtaining nanocapsules, a reduction in losses in the preparation of nanocapsules and can be used in the pharmaceutical industry.1 cl, 3 dwg, 4 ex