FIELD : medicine; pharmaceuticals.SUBSTANCE : present invention refers to pharmaceutical industry, namely to a method for producing nanosuspension. Method of producing a stable nanosuspension containing nanoparticles of at least one natural material and an extract of at least one natural material, wherein the method includes steps of providing particles of at least one natural material having a size D100 less than 320 mcm, wherein the natural material does not contain ginseng, providing an extract of at least one natural material, dispersing in said solvent of said particles of at least one natural material from step and said extract of at least one natural material from step milling the dispersion to obtain particles with size D90 less than 1000 nm and addition of a stabilizer, where at least one natural material is selected from a group consisting of plants, cyanobacteria, algae or fungi. Nanosuspension.EFFECT : group of solutions described above enables to obtain nanosuspensions from natural materials with a higher concentration of active substances.15 cl, 5 dwg, 3 ex