Film preparation and process for preparing the same
An object is to provide a film preparation comprising a polymer harmless to living bodies and being highly adhesive to the skin; and a film preparation further containing a pharmaceutically active oily ingredient and being highly adhesive to the skin. More specifically, provided is a film preparation comprising a drug, a wetly shear-triturated low-substituted cellulose ether having a molar substitution of from 0.05 to 1.0 per anhydrous glucose unit, and a water-soluble cellulose ether, and having 100 minutes or greater of adhesion ability to the skin. The preparation becomes a skin-adhesive hydrous sheet having excellent skin adhesion after it is wet with water as it is used.
1. 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.
2. The film preparation according to claim 1 wherein said drug is an oily substance.
3. A skin-adhesive hydrous sheet obtained by wetting said film preparation as claimed in claim 1 .
4. A skin-adhesive hydrous sheet obtained by wetting said film preparation as claimed in claim 2 .
5. The film preparation according to claim 1 , wherein said wetly shear-triturated low-substituted cellulose ether is obtained by wet shear-trituration of low-substituted cellulose ether having a concentration of 2 to 20 wt %.
6. The film preparation according to claim 2 , wherein said wetly shear-triturated low-substituted cellulose ether is obtained by wet shear-trituration of low-substituted cellulose ether having a concentration of 2 to 20 wt %.
7. 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 a water-soluble cellulose ether, 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, and wherein the preparation is in the form of a continuous film capable of adhering to skin upon being wetted.
8. The film preparation according to claim 7 , wherein said drug is an oily substance.
9. A skin-adhesive hydrous sheet obtained by wetting said film preparation as claimed in claim 7 .
10. A skin-adhesive hydrous sheet obtained by wetting said film preparation as claimed in claim 8 .
11. The film preparation according to claim 7 , wherein said wetly shear-triturated low-substituted cellulose ether is obtained by wet shear-trituration of low-substituted cellulose ether having a concentration of 2 to 20 wt %.
12. The film preparation according to claim 8 , wherein said wetly shear-triturated low-substituted cellulose ether is obtained by wet shear-trituration of low-substituted cellulose ether having a concentration of 2 to 20 wt %.
13. The film preparation according to claim 1 , wherein the film is transparent.
14. The film preparation according to claim 7 , wherein the film is transparent.
15. The film preparation according to claim 1 , wherein after adherence for 100 minutes or greater to skin, said film can be peeled off without portions of the film remaining adhered to skin.
16. The film preparation according to claim 7 , wherein after adherence for 100 minutes or greater to skin, said film can be peeled off without portions of the film remaining adhered to skin.