Sustained-release prepararation of basic medical agent hydrochloride
US5234691A · kind A · utility
5Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1990 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Oct 26, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K31/425
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A preparation obtained by coating granules containing both a basic medical agent hydrochloride (e.g. allotinolol hydrochloride) and a polyanion the particles of which are present in the form of a discontinuous layer, with a film containing a slightly water-soluble substance, can release said agent at a controlled rate without influenced by the physiological factors of the gastrointestinal tract of a patient when orally administered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.