Sustained release preparation
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United States of America Patent
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-
Mar 21, 1989
Grant Date -
N/A
app pub date -
Jan 10, 1986
filing date -
Jan 11, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sustained release preparation comprising: (a) chitin, chitosan, or a mixture thereof (b) anionic polymer compounds such as those having a carboxyl group, a sulfonic acid group, or a group capable of providing the same, and (c) pharmaceutically active agents. This sustained release preparation can provide the desired sustained-release or dissolution of the pharmaceutically active agents in human organs irrespective of the acidity (i.e., pH conditions) therein.
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