The present invention relates to a novel process for producing nanoparticles incorporating active compounds and their use as drugs. The nanoparticle production process comprises steps (a) dissolving at least one active compound and at least one polymer in an organic solvent, (b) mixing the solution prepared in step (a) with an aqueous phase, ( c) evaporation of the organic solvent, (d) purification of the nanoparticles incorporating the active compound obtained in step (c) by dialysis against an aqueous dialysis solution containing the active compound. [Selection] Figure 2本発明は、活性化合物を取り込んだナノ粒子の新規製造プロセス及びその薬物としての使用に関する。ナノ粒子の製造プロセスは、工程(a)少なくとも1種の活性化合物と少なくとも1種のポリマーの有機溶媒への溶解、(b)工程(a)で調製された溶液と水相との混合、(c)有機溶媒の蒸発、(d)工程(c)で得られた活性化合物を取り込んだナノ粒子の、同活性化合物を含む透析水溶液に対する透析による精製を含む。【選択図】図2