Provided are: a rapidly disintegrating tablet (in particular, an orally disintegrating tablet) containing drug-containing particles imparting a desired function based on the properties of the drug, which tablet still fully expresses the function even after a formulation step which might sometimes have an impact on the function thereof； and a method for producing the same. The rapidly disintegrating tablet is obtained by treating, with carbon dioxide in a super critical or subcritical state or with carbon dioxide liquid or gas, a drug and a material which is given the function of a binding agent by treatment with carbon dioxide in a super critical or subcritical state or with carbon dioxide liquid or gas.
