PROBLEM TO BE SOLVED: To provide a naftopidil-containing orally disintegrating tablet that is capable of producing simply, suppresses the change of a tablet color under humid conditions and under high-heat and high-humidity conditions, and has sufficient disintegrating properties.SOLUTION: The naftopidil-containing orally disintegrating tablet of the present invention includes naftopidil and porous spherical particles of anhydrous dibasic calcium phosphate, the porous spherical particles of anhydrous dibasic calcium phosphate has a mean particle diameter of 100 μm or more to 500 μm or less, and the specific surface area of the porous spherical particles of the anhydrous dibasic calcium phosphate is 25 m/g or more.SELECTED DRAWING: None
