Milling process for the production of finely milled medicinal substances
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United States of America Patent
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Nov 4, 2003
Issued Date -
N/A
app pub date -
Jun 1, 2001
filing date -
Dec 1, 1998
priority date (Note) -
Expired
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Abstract
The invention is an improved method of generating fine medicament powders suitable for inhalation. A fluid energy mill is used with conventional milling fluids such as air or nitrogen. The milling fluid is treated to have a controlled relative humidity of between 30% and 70%. This produces a fine medicament powder with a median particle size below 10 micrometer but with little or no amorphous content generated during milling. Scale formation in the mill chamber is also greatly reduced.
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