Controlled release pharmaceutical preparation

Details Controlled release pharmaceutical preparation Controlled release pharmaceutical preparation

1991-06-28

1992-08-11

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Particulate form

424490, 424494, 424495, 514963, A61K 954, A61K 956, A61K 958

Patent

active

051377330

ABSTRACT:
A controlled release pharmaceutical preparation comprising a core containing a medicinal compound and a coating layer containing a water-repellent salt and a water-insoluble and slightly water-permeable acrylic polymer having trimethylammoniumethyl group. Said preparation releases a medicinal compound in a sigmoid type dissolution pattern irrespective of the PH of a dissolution medium.

REFERENCES:
patent: 4954350 (1990-09-01), Jones et al.
patent: 4983401 (1991-01-01), Eichel et al.
patent: 5002776 (1991-03-01), Geoghegan et al.
patent: 5013557 (1991-05-01), Tai

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