Patent ID: 7976864

Claim:
A dry film preparation comprising a drug, wetly shear-triturated low-substituted cellulose ether having a molar substitution of 0.05 to 1.0 per anhydrous glucose unit and an average particle size of 20 μm or less in the swelling state by containing water, and water-soluble cellulose ether, and being in the form of a continuous film capable of adhering to skin for 100 minutes or greater upon being wetted, wherein the weight ratio of the low-substituted cellulose ether to the water-soluble cellulose ether is from 98:2 to 70:30, and wherein the wetly shear-triturated low-substituted cellulose ether is obtained by wet shear-trituration of an aqueous dispersion of low-substituted cellulose ether.