Hydrophilic vehicle-based dual controlled release matrix system
US8333989B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 2006 |
| Grant date | Dec 18, 2012 |
| Priority date | — |
| Expiry date | Jul 7, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K31/554
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A hydrophilic vehicle-based dual controlled-release matrix system, suitable for encapsulation in hard or soft capsules, has been developed. The matrix is in the form of a solution or a suspension, which allows for easier formulation of low dose compounds. The matrix includes two rate controlling barriers for the controlled release of one or more pharmaceutically active agents. The primary rate controlling barrier includes a hydrophilic vehicle. The primary rate controlling barrier can further comprise one or more solvents which are miscible with the hydrophilic vehicle. The secondary rate controlling barrier includes a hydrogel-forming polymeric material dissolved or dispersed in the hydrophilic vehicle. The presence of the hydrogel-forming polymeric material makes extraction of the drug from the dosage form more difficult. This feature could be beneficial in preventing or minimizing the misuse of dosage forms which contain drugs which are prone to abuse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.