Patent ID: 9713593
Date: 2017-07-25
CPC Classifications: A61K,C08B

Claim:
1. A method for producing a solid preparation comprising: bringing pulp into contact with an alkali metal hydroxide solution to obtain alkali cellulose, reacting the alkali cellulose with an etherifying agent to obtain a first methyl cellulose, pulverizing the first methyl cellulose, and depolymerizing the pulverized first methyl cellulose through hydrolysis in the presence of an acid catalyst or through oxidative decomposition in the presence of an oxidant to obtain a second methyl cellulose; pulverizing the second methyl cellulose, and a step of tableting a mixture or granulated product comprising an orally administrable drug and the pulverized second methyl cellulose for use in tableting by a dry direct tableting method or a dry granulation tableting method, to obtain the solid preparation, and wherein said second methyl cellulose is water-soluble.