Pharmaceutical tablet capable of releasing the active ingredients contained therein at subsequent times
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United States of America Patent
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Jul 22, 1997
Grant Date -
N/A
app pub date -
Oct 24, 1995
filing date -
May 31, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pharmaceutical tablet capable of releasing the active ingredients contained therein at subsequent times produced via the steps of: a) preparing a tablet consisting of three superposed layers, the upper layer containing an active ingredient, the intermediate layer not containing any active ingredient and forming a barrier-type layer, and the lower layer containing an active ingredient, said upper layer presenting a raised top, b) coating the tablet entirely with an impermeable polymeric film, and c) removing said raised top and thus allowing contact of the abraded upper layer surface with the environment.
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