A pharmaceutical composition for oral administration, comprising 3-hydroxy-N 1 -(4-methoxybenzoyl)-N 2 -[4-(4-methyl-1,4-diazepan-1-yl)benzoyl]-1,2-phenylenediamine or a pharmaceutically acceptable salt thereof, and hydroxypropyl cellulose having a viscosity of approximately 6 mPa€¢S (inclusive) to approximately 150 mPa€¢S (exclusive) in a 2% aqueous solution at 20°C, or a viscosity of 75 mPa€¢S (inclusive) to 400 mPa€¢S (inclusive) in a 5% aqueous solution at 25°C, and a process of manufacturing the pharmaceutical composition for oral administration are disclosed.
