PROBLEM TO BE SOLVED: To provide a compression-molding formulation of magnesium oxide which has no blackish color on its surface, and has a high moldability at the time of production, is easy to perform compression-molding without attaching magnesium oxide to a molding machine, and is easy to be taken at the time of administration, and to provide a method for producing the same.SOLUTION: A compression-molding formulation contains 50-86 wt.% of magnesium oxide and 6-20 wt.% of calcium silicate based on a total amount of the formulation.COPYRIGHT: (C)2015,JPO&INPIT【課題】表面に黒ずみがなく、しかも製造時に高い成形性を示し、成形機に酸化マグネシウムが付着せず圧縮成形しやすいもので、服用時には飲みやすい酸化マグネシウム圧縮成形製剤、及びその製造方法等を提供する。【解決手段】製剤全量に対して酸化マグネシウムを50~86重量%、及びケイ酸カルシウムを6~20重量%含有する圧縮成形製剤。【選択図】なし