System for osmotic delivery of pharmaceutically active agents
US6838093B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2001 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Jun 1, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P37/08
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An osmotic system for delivering a pharmaceutically active agent which comprises a core portion, a layer portion enclosing the core portion, and a semipermeable wall portion enclosing the core portion and the layer portion. The core portion includes the pharmaceutically active agent at a first concentration. The pharmaceutically active agent is present in the layer portion at a second concentration. The second concentration is greater than the first concentration. Such a system provides for the osmotic release of the pharmaceutically active agent in release profile other than a zero order release profile, and wherein the release profile is similar to or approaches or reaches a first order release profile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.