abstract |
The present invention relates to a method for efficiently and easily producing epalrestat B-type crystals having a single crystal form with high solubility, and a pharmaceutical composition containing the single crystal form of epalrestat crystals obtained by the production method of the present invention. To provide things. A method for producing epalrestat crystals, wherein epalrestat is dissolved in methanol, and then the resulting solution is cooled and crystallized, and a pharmaceutical comprising epalrestat crystals obtained by the production method Composition. [Selection figure] None |