The present invention provides an olmesartan . medoxomil containing preparation of which the elution characteristic was improved.The present invention comprises a process for preparing an olmesartan . medoxomil containing preparation, which is characterized in that comprising the process of compressing the composition.提供改善溶出性之含有奥美撒旦.美多奇索米(olmesartan.medoxomil)之製劑。以含有壓縮組成物之工程為特徵之奥美撒旦.美多奇索米含有製劑之製造方法。