Tablet for instant and prolonged release of one or more active substances
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United States of America Patent
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Apr 16, 2002
Grant Date -
N/A
app pub date -
Jun 21, 2000
filing date -
Dec 23, 1997
priority date (Note) -
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Abstract
A multi-layer tablet for the instant and prolonged release of active substances comprises at least two layers where the first outer layer comprises a mixture of excipients and an active substance, allowing for the immediate release of the active substance within the first layer, and a second layer, arranged in contact with the first layer. The second layer comprises a nonbiodegradable inert porous polymeric matrix in which an active substance is dispersed, allowing for the prolonged release of the active substance within the second layer.
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