Microparticle and pharmaceutical composition thereof
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United States of America Patent
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Apr 30, 2013
Grant Date -
Jan 6, 2011
app pub date -
Feb 20, 2009
filing date -
Feb 22, 2008
priority date (Note) -
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Abstract
A microparticle includes an agglomerate of a hydrophilic active substance containing particle, which particle includes an amphiphilic polymer composed of a hydrophobic segment of poly(hydroxy acid) and a hydrophilic segment of polysaccharides or polyethylene glycol, and a hydrophilic active substance. It is characterized by an efficient inclusion of the hydrophilic active substance, and a release of the hydrophilic active substance at an appropriate speed in the human body, and is hence very useful as a DDS pharmaceutical preparation.
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