The present invention provides a method for improving dissolution of the solid preparation comprising olmesartan medoxomil and azelnidipine.The said solid preparation is prepared by the separate way of olmesartan medoxomil and azelnidipin each other being out of contact.本發明提供含有奧美沙坦酯及阿折地平之固形製劑之溶出性改善方法。其以奧美沙坦酯與阿折地平互相未接觸的方式分離調配。