Sustained release pharmaceutical composition

Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Tablets – lozenges – or pills

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Details

424461, 424462, 424468, 424489, 424490, 424493, 424494, 424495, 424497, A61K 924, A61K 958

Patent

active

053784740

ABSTRACT:
The present invention relates to a pharmaceutical pellet composition having a core element including at least one highly soluble active ingredient and a core coating which is partially soluble at a highly acidic pH. The pharmaceutical composition provides a slow release of active ingredient at a highly acidic pH and provides a constant, relatively faster rate of release at a more alkaline pH such as that of the intestine. Oral administration of the pharmaceutical pellet composition of the present invention to a patient is effective to deliver to the blood levels of active ingredient within the therapeutic range and to maintain such levels over an extended period of time.

REFERENCES:
patent: 4708874 (1987-11-01), Haan et al.
patent: 4713248 (1987-12-01), Kjorn et al.
patent: 4800087 (1989-01-01), Mehta
patent: 4851228 (1989-07-01), Zentner et al.
patent: 5196203 (1993-03-01), Boehm
patent: 5202128 (1993-04-01), Morella

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