Disclosed is a method for producing a solid preparation containing a compound represented by the general formula (I) below or a pharmacologically acceptable salt thereof and having improved dissolvability. Specifically disclosed is a method for producing a solid preparation containing a compound represented by the general formula (I) below or a pharmacologically acceptable salt thereof, which comprises a step wherein a composition containing a compound represented by the general formula (I) below or a pharmacologically acceptable salt thereof is mixed, while applying mechanical stress to the composition.
