THE PRESENT INVENTION PROVIDES A SOLID DISPERSION IN WHICH REVAPRAZAN PARTICLES ARE SURFACE-MODIFIED WITH A WATER-SOLUBLE POLYMER, A WATER-SOLUBLE SACCHARIDE, A SURFACTANT, OR A MIXTURE THEREOF AND A PROCESS FOR PREPARING THE SAME. THE PRESENT INVENTION ALSO PROVIDES A PHARMACEUTICAL COMPOSITION CONTAINING THE SOLID DISPERSION AND A PROCESS FOR PREPARING THE PHARMACEUTICAL COMPOSITION.