Controlled release coated tablets having prolonged gastric retention
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United States of America Patent
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May 29, 2012
Grant Date -
Oct 2, 2008
app pub date -
Nov 3, 2006
filing date -
Nov 3, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a tablet composed of a core and a coating; said core is formed by two or more layers, wherein at least one of them contains an active agent (3). Wherein one of said layers is formulated as a swellable composition (2), the other one (4) is composed of inert compounds retaining its size at least until the coated tablet is emptied from the stomach. The coating composition is selected from the group comprising water insoluble polymers, ph dependent polymers or mixtures thereof. The active agent is released after rupture of the coating.
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