IT IS DESIRED TO PROVIDE A PHARMACEUTICAL COMPOSITION CONTAINING A COMPOUND REPRESENTED BY FORMULA (I) OR A PHARMACOLOGICALLY ACCEPTABLE SALT THEREOF, OR A SOLVATE THEREOF, WHICH EXHIBITS AN INHIBITORY EFFECT ON ACTIVATED BLOOD COAGULATION FACTOR X (FXa), AND IS USEFUL AS AN AGENT FOR PREVENTING AND/OR TREATING THROMBOSIS, WHEREIN THE PHARMACEUTICAL COMPOSITION EXHIBITS FAVORABLE DISSOLUTION PROPERTIES. THE PRESENT INVENTION RELATES TO A SOLID PHARMACEUTICAL COMPOSITION CONTAINING A COMPOUND REPRESENTED BY FORMULA (I) OR A PHARMACOLOGICALLY ACCEPTABLE SALT THEREOF, OR A SOLVATE THEREOF, WHEREIN THE CONTENT OF THE COMPOUND REPRESENTED BY FORMULA (I) IS 0.5% BY WEIGHT OR MORE AND LESS THAN 15% BY WEIGHT WITH RESPECT TO THE TOTAL WEIGHT OF THE PHARMACEUTICAL COMPOSITION.
