Method for preparing solid enteric pharmaceutical preparation
US5750148A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1995 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Aug 15, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/5042
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A cellulosic enteric base is dissolved in an organic solvent capable of being admixed with water in any rate or a mixed solvent of the organic solvent and water to give a polymer solution, followed by mixing the polymer solution with water, then removing the organic solvent to give a concentrate; adding an anionic surfactant to the concentrate and then drying to give polymer powder. The polymer powder is introduced into water to give an emulsion containing polymer particles having an average particle size of not more than 1 .mu.m and the emulsion is dispersed in water containing a plasticizer to give a coating liquid. A drug is coated with the coating liquid to give a solid enteric pharmaceutical preparation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.