An object of the present invention is to provide a freeze-dried aripiprazole powder formulation that exhibits good dispersibility and is easily dispersed into a homogenous suspension when reconstituted with water. The present invention provides a freeze-dried aripiprazole formulation obtained by a process comprising the steps of spraying for freezing an aripiprazole suspension containing (I) aripiprazole, (II) a vehicle for the aripiprazole, and (III) water for injection, and drying.本發明之一目標為提供一具有良好分散性且當經水復原時可輕易分散入一均質懸浮液內的冷凍乾燥阿立哌唑粉末調配物。本發明提供一藉包括以下步驟之方法而獲得的冷凍乾燥阿立哌唑調配物:噴霧冷凍一含(I)阿立哌唑、(II)一用於該阿立哌唑之載劑、及(III)用於注射之水的阿立哌唑懸浮液,然後乾燥。
