Solid preparations include: (a) 6 - ((7S) - 7-hydroxi-6, 7-dihydro-5h-pirrolo [1, 2-C] imidazol-7-il] - n-methyl-2-naftamida or one of the salts with a content of 50-80% by weight; (b) d-manitol; and (c) alkaline metal salts selected from magnesium and calcium silicate. In addition, the preparation includes hydroxypropyl celluloseREFERIDO A UNA PREPARACION SOLIDA QUE COMPRENDE: A) 6-((7S)-7-HIDROXI-6,7-DIHIDRO-5H-PIRROLO[1,2-C]IMIDAZOL-7-IL)-N-METIL-2-NAFTAMIDA O UNA DE SUS SALES, CON UN CONTENIDO DEL 50-80% EN PESO; B) D-MANITOL Y, C) UNA SAL DE METAL ALCALINOTERREO SELECCIONADA DE ALUMINOMETASILICATO DE MAGNESIO Y SILICATO DE CALCIO. ADEMAS DICHA PREPARACION COMPRENDE HIDROXIPROPILCELULOSA