The oral preparation of this invention has a drug-containing layer that contains the drug, disintegration-controlling layers provided on both surfaces of the drug-containing layer, and gel-forming layers provided on each disintegration-controlling layer of the drug-containing layer and which swell by absorbing water to form a gel. Each disintegration-controlling layer is characterized by the fact that it is composed of materials including a gastrosoluble material that dissolves when coming into contact with gastric juice. The oral preparation of this invention is easy to swallow and can release the drug at targeted sites of the body, particularly in the stomach.
