Once daily pharmaceutical tablet having a unitary core
US6485748B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1997 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Dec 12, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/2886
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A controlled release tablet is disclosed which comprises:(a) a homogeneous compressed core which comprises:(i) a medicament which is very slightly soluble to practically insoluble in water at 25° C.;(ii) a water soluble osmotic compound(iii) one or more osmotic polymers; and(b) a membrane coating which completely covers said core tablet which comprises a mixture of a:(i) a water insoluble pharmaceutically acceptable polymer; and(ii) a pH dependent polymer such as an enteric coating polymer, the weight ratio of the pH dependent polymer to the water insoluble pharmaceutically acceptable polymer being 0.1:1 to 0.75:1.A controlled release tablet which comprises:(a) a medicament(a) a homogeneous compressed core which comprises:(i) a medicament;(ii) a water soluble osmotic compound(iii) one or more osmotic polymers; and(b) a membrane coating which completely covers said core tablet which comprises a mixture of:(i) a water insoluble pharmaceutically acceptable polymer; and(ii) an enteric polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.