Sustained release drug-resin complexes
US4996047A · kind A · utility
170Cited by
11References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1988 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Nov 2, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K47/585
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Disclosed are oral pharmaceutical preparations which comprise a pharmacologically active drug bound to small particles of an ion-exchange resin to provide a drug-resin complex having a drug content above a specified value. The drug-resin complex is subsequently coated with a water-permeable diffusion barrier coating that is insoluble in gastrointestinal fluids thereby providing a controllable sustained release of drug under conditions encountered in the gastrointestinal tract.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.