Method for preparing film coated pharmaceutical preparations and method for improving properties thereof
US5008113A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | May 19, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/2866
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Film coated pharmaceutical preparations, which are prepared by overlaying to the outer surface of pharmaceutical preparations, a coating layer comprising at least one member selected from the group consisting of methyl cellulose, hydroxypropylmethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose phthalate, hydroxypropylmethyl cellulose acetate succinate, carboxymethylethyl cellulose and cellulose acetate phthalate, are irradiated with light including ultraviolet rays. Whereby film coated pharmaceutical preparations, the coating layer surface of which are excellent in whiteness, are prepared. Moreover, as a content of a white pigment in corporated into the coating layer of such preparations may be reduced, the stability of such preparations can be enhanced without impairing the strength of the coating layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.