Stable pharmaceutical compositions comprising acid labile benzimidazoles

This invention provides a solid preparation without enteric coating which contains an acid labile active ingredient, particularly, a benzimidazole compound having an antiulcer action, and can neutralize the acid in stomach quickly, and exerts quickly the pharmacological effect of the active ingredient and suppresses the generation of a carbon dioxide gas as much as possible. A gastric disintegrable solid preparation contains an acid labile active ingredient, particularly, a benzimidazole compound, and at least one component selected from metal oxides and metal hydroxides. The preparation does not enteric-coated, but has a disintegration time of 7 minutes or less.