MICROSPHERES FOR RELEASING AN OCTREOTIDE COMPOUND WITHOUT AN INITIAL TIME LAG
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United States of America Patent
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Issued Date -
Apr 8, 2010
app pub date -
Oct 6, 2008
filing date -
Oct 6, 2008
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Abandoned
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Abstract
Microspheres for releasing an octreotide compound without an initial time lag include a poly(D,L-lactide-co-glycolide) polymer (PLGA polymer) matrix having a ratio of lactide to glycolide ranging from 80:20 to 90:10 mol %. The polymer has a molecular weight ranging from about 6000 to 16000. The octreotide compound is dispersed in the polymer matrix. The microspheres can be made by forming a dispersed phase by combining the above polymer, dichloromethane, the octreotide compound, methanol and acetic acid. A target loading of the octreotide compound in the dispersed phase ranges from 7 to 12% by weight. Polyvinyl alcohol is dissolved in water to form a continuous phase. The dispersed phase is mixed in the continuous phase to form a microsphere suspension. The dichloromethane, acetic acid, methanol and polyvinyl alcohol are removed from the microsphere suspension. Residual dichloromethane and methanol are removed from the microspheres by washing.
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