Patent 7964218 was granted and assigned to Mitsubishi Tanabe Pharma on June, 2011 by the United States Patent and Trademark Office.
The present invention provides an oral grain preparation comprising an agent swellable in the mouth as an active component, wherein the preparation has an inner coating layer of a water-soluble cellulose polymer and an outer coating layer of an ethylcellulose on a plain grain having a diameter of 3 to 4 mm. The agent of the present invention is free from sliminess peculiar to cellulose and adherence of each grains in the mouth at taking, and has excellent feeling for taking without an unpleasant feeling such as caused by a large tablet.