Method for producing microspheres loaded with drugs and microspheres loaded with drugs produced thereby

The present invention relates to a method for producing polymeric microspheres loaded with drugs and polymeric microspheres loaded with drugs produced thereby, specifically a method for producing polymeric microspheres loaded with drugs, the method comprising the steps of a) adding a dispersion phase containing a high molecular compound, a drug, and a water-insoluble organic solvent to a dispersion solvent to produce an O/W (oil-in-water) type or O/O (oil-in-oil) type emulsion, or adding a W/O (water-in-oil) type emulsion, which is prepared by emulsifying an aqueous solution, in which a drug is dissolved, in a water-insoluble organic solvent, in which the high molecular compound is dissolved, to the dispersion solvent to produce a W/O/W (water-in-oil-in-water) type emulsion; and b) adding an ammonia solution to the emulsion produced in step a) to convert the water-insoluble organic solvent into water-soluble solvents, and polymeric microspheres loaded with drugs produced thereby. According to the present invention, the desired polymeric microspheres loaded with drugs can be simply produced with a small amount of water in a short period of time.