MEDICAMENT-CONTAINING HOLLOW PARTICLE
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United States of America Patent
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Mar 29, 2017
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Aug 20, 2012
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Abstract
The invention provides a particle composed of a shell and a hollow, wherein the shell contains a medicament and a polymer, and a volume ratio of the hollow relative to the whole particle is 1%-50%. The invention also provides a process for preparation of the hollow particle, which includes a step of granulating a powder mixture containing a medicament and a polymer, while spraying a solvent capable of dissolving the polymer.
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