Oral pharmaceutical preparation released at infragastrointestinal tract
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United States of America Patent
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-
Nov 21, 1995
Grant Date -
N/A
app pub date -
Jun 25, 1993
filing date -
Aug 13, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An oral pharmaceutical preparation of a type released at infragastrointestinal tract was successfully prepared, wherein a solid organic acid dissolvable, in the form of a solution, of chitosan and a solid pharmaceutical preparation including a principal agent are filled in a hard capsule composed of the base principally comprising chitosan and an enteric coating is formed on the surface of the hard capsule, characterized in that a desirable releasing time can be arranged, with no pH dependency, via water permeability derived from the porosity of chitosan of the capsule preparation.
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