Abstract: A tablet which comprises solid particles, especially magnesium oxide particles as the main component and has excellent shape retentivity with extremely low susceptibility to wearing and chipping. The tablet has a domed shape on each of the upper and lower horizontal surfaces of a cylindrical plate shape, wherein the domed shape on each of the upper and lower horizontal surfaces satisfies the following requirements (a), (b) and (c) in the cross-sectional shape including the center line of the cylindrical plate shape: (a) each corner has an angle of 25 to 45°, (b) each corner has a horizontal length of 0.30 to 1.0 mm, and (c) the cup has a depth of 0.6 to 1.2 mm.

Abstract: A tablet having excellent disintegration properties, as a tableted product, for a long time and has excellent shape-retention stability by the improvement of the strength of the tablet. The antacid and laxative tablet comprises magnesium oxide particles as the main component, wherein (a) the average secondary particle diameter measured by a laser diffraction scattering method of the magnesium oxide particles is 0.5 to 10 ?m, (b) the content of the magnesium oxide particles is 85 to 96 wt %, (c) the content of crystalline cellulose as a binder is 2 to 8 wt %, (d) the content of croscarmellose sodium as a disintegrating agent-I is 0.8 to 2.5 wt %, (e) the content of insoluble polyvinyl pyrrolidone as a disintegrating agent-II is 1 to 3.5 wt %, and (f) the content of a lubricant is 0.5 to 2 wt %.

Abstract: A tablet which comprises solid particles, especially magnesium oxide particles as the main component and has excellent shape retentivity with extremely low susceptibility to wearing and chipping. The tablet has a domed shape on each of the upper and lower horizontal surfaces of a cylindrical plate shape, wherein the domed shape on each of the upper and lower horizontal surfaces satisfies the following requirements (a), (b) and (c) in the cross-sectional shape including the center line of the cylindrical plate shape: (a) each corner has an angle of 25 to 45°, (b) each corner has a horizontal length of 0.30 to 1.0 mm, and (c) the cup has a depth of 0.6 to 1.2 mm.

Abstract: An antacid and laxative tablet comprising magnesium oxide particles as an effective component, wherein (i) the magnesium oxide particles contained in the tablet have an average secondary particle diameter measured by a laser diffraction scattering method of 0.5 to 10 ?m, (ii) the content of magnesium oxide particles in the tablet is 88 wt % or more, (iii) the tablet does not become blackish and has substantially no tableting spot, and (iv) the disintegration time is 10 sec or less. The antacid and laxative tablet of the present invention has a high content of magnesium oxide particles, a short disintegration time, does not become blackish, has no tablet trouble and no tableting spot and is suitably administered orally.

Abstract: An antacid and laxative tablet comprising magnesium oxide particles as an effective component, wherein