[Problem] To provide novel technology with which elution performance of a pharmaceutical active ingredient can be improved in a solid pharmaceutical preparation containing as the pharmaceutical active ingredient a compound that gels on contact with water. [Solution] A capsule pharmaceutical preparation comprises a capsule and, filled into the capsule, a composition for filling the capsule containing a pharmaceutical active ingredient and a disaccharide alcohol, wherein the pharmaceutical active ingredient is a water-gelling compound, which is a compound having the property of gelling on contact with water, and the disaccharide alcohol is added at a ratio of at least 0.5 parts by mass per 1 part by mass of water-gelling compound.
