Prolonged release microparticle preparation and production of the same
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United States of America Patent
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Apr 22, 1997
Issued Date -
N/A
app pub date -
May 31, 1995
filing date -
Oct 1, 1991
priority date (Note) -
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Abstract
A novel microparticle preparation comprising microparticles of a polymer which contain a drug and are coated with a film of an agent for preventing aggregation of the microparticles is disclosed. The preparation is produced by spraying a solution of a polymer containing a drug and an aqueous solution of an agent for preventing aggregation of the microparticles separately from different nozzles and contacting them with each other in a spray dryer.
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