Carbidopa/levodopa gastroretentive drug delivery
US9554991B2 · kind B2 · utility
0Cited by
6References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2016 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Jan 14, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P35/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A gastroretentive drug formulation for the sustained release of an active agent in the gastrointestinal tract comprises an internal layer or compartment comprising an active agent and one or more pharmaceutical excipients, of which at least one is a polymer and two membranes forming together an envelope around the inner membrane, each membrane comprising at least one polymeric combination of an enteric polymer which is not soluble in gastric juice, and an hydrophilic swelling polymer, and at least one plasticizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.