Morphine controlled release system
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United States of America Patent
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Jun 28, 2016
Issued Date -
N/A
app pub date -
Sep 25, 2014
filing date -
Mar 26, 2003
priority date (Note) -
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Abstract
Described are controlled release oral pharmaceutical composition comprising an erodible matrix composition comprising a polyethylene oxide, a therapeutically effective amount of an opioid or a pharmaceutically acceptable salt, complex, solvate or anhydrate thereof, or a mixture thereof and, optionally, one or more pharmaceutically acceptable excipients, and a coating on the matrix composition, wherein the coating has at least one opening exposing a surface of an end portion of the matrix composition, thereby allowing controlled release of the opioid by erosion of the matrix surface, wherein the composition exhibits zero order release of at least 80% of the opioid contained in the composition. The matrix may have a cylindrical shape having a long axis and a conus-shaped end portion having a largest diameter and a smallest diameter, such that the surface area exposed increases during erosion of the conus-shaped end portion.
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