The object of the invention is to provide a formulation with improved pharmacokinetics comprising a compound of formula [I] or a pharmaceutically acceptable salt or hydrate thereof, and a preparation method thereof. The invention relates to a solid dispersion comprising an amorphous compound of formula [I] or a pharmaceutically acceptable salt or hydrate thereof, and 1 to 4 pharmaceutically acceptable polymers selected from hydroxypropyl methylcellulose acetate succinate, methyl cellulose, hydroxypropyl methylcellulose and polyvinyl alcohol, and a preparation method thereof.

Area Code: JP

Application Number: CN202080018640.9