THE PRESENT INVENTION PROVIDES A DISINTEGRATING TABLET WHICH DISPLAYS EXCELLENT DISINTEGRATING ABILITY, STRENGTH AND DRUG STABILITY WHILE CONTAINING A HYGROSCOPIC DRUG. SPECIFICALLY, THE PRESENT INVENTION PROVIDES A DISINTEGRATING TABLET COMPRISING A DRUG HAVING AN EQUILIBRIUM MOISTURE CONTENT OF 10-20% UNDER A RELATIVE HUMIDITY OF 75% AT 25°C, ERYTHRITOL, MANNITOL, AND HYDROXYPROPYL CELLULOSE HAVING AN EQUILIBRIUM MOISTURE CONTENT OF 5-20% UNDER A RELATIVE HUMIDITY OF 75% AT 25°C AND HAVING A VISCOSITY OF 100-2000 CPS WHEN BEING IN THE FORM OF AN AQUEOUS SOLUTION OF 20% BY MASS AT 37°C, WHEREIN SAID DISINTEGRATING TABLET CONTAINS SAID DRUG IN AN AMOUNT OF 15-50% BY MASS OF THE TOTAL AMOUNT OF SAID DISINTEGRATING TABLET AND HAS POROSITY OF 10-40%.
