Gastroretentive controlled release microspheres for improved drug delivery
US6207197A · kind A · utility
37Cited by
10References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1999 |
| Grant date | Mar 27, 2001 |
| Priority date | — |
| Expiry date | Nov 18, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P31/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
There is provided a drug delivery composition for the controlled release of an active agent in the stomach environment over a prolonged period of time, which comprises a microsphere comprising an active ingredient in the inner core of the microsphere and (i) a rate controlling layer of a water insoluble polymer and (ii) an outer layer of a bioadhesive agent in the form of a cationic polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.