The invention relates to a co-micronisation product comprising: an active principle selected from the group containing ulipristal acetate, a metabolite thereof and mixtures of same, and a pharmaceutically acceptable solid surfactant. The invention also relates to a pharmaceutical composition comprising the co-micronisation product and to the therapeutic uses thereof.本發明係關於一種聯合微粉化產物,其組成包括選自由醋酸烏利司他、醋酸烏利司他代謝產物及其混合物組成之群的活性成分,以及醫藥學上可接受之固體界面活性劑。本發明亦係關於一種包括所述聯合微粉化產物之醫藥組合物及其治療用途。