Method and apparatus for producing dry particles

Inactive Publication Date: 2006-02-23
CIVITAS THERAPEUTICS
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  • Abstract
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Benefits of technology

[0028] It is a feature of the present invention that a static mixer is used to combine two liquid components to form a combination that is atomized into droplets that are dried to form particles. The static mixer advantageously provides rapid and homogeneous mixing of the two liquid components. This is particularly advantageous when the two liquid components are physically and/or chemically incompatible with each other. Because of the homogeneous mixing provided by the

Problems solved by technology

The first and second components are such that combin

Method used

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  • Method and apparatus for producing dry particles
  • Method and apparatus for producing dry particles

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[0179] Preparation of Dry Particles Containing hGH

[0180] In a preferred aspect of the present invention, it was desired to prepare inhalable dry particles containing hGH (human growth hormone) that would maximize the amount of active hGH that reached the alveolar space. To do so, it was determined that the inhalable dry particles should have a FPF(5.6) of at least about 85% and a FPF(3.4) of at least about 55%. It was also desired to have at least 95% of the hGH in the dry particles be “readily extractable”, that is, soluble in buffer solution. When the hGH is exposed to incompatible components, for example, organic solutions such as ethanol solution, the hGH degrades or denatures, resulting in degradation products that include insoluble aggregates and soluble dimer. The method and apparatus of the present invention were developed to minimize the amount of insoluble aggregates and soluble dimer in the finished dry particles by minimizing the contact between the hGH solution and the...

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Abstract

Method and apparatus for producing dry particles. Two liquid components are combined in a static mixer, atomized into droplets, and the droplets dried to form dry particles. Use of the static mixer enables incompatible liquid components to be rapidly and homogeneously combined. The present invention optimizes process conditions for increasing and controlling particle porosity. The present invention also allows for optimization of particle size in real-time during particle production.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a method and apparatus for producing dry particles. More particularly, the present invention relates to a method and apparatus for producing dry particles that are suitable for inhalation into the lung, and which contain an active agent. [0003] 2. Related Art [0004] Delivery of drugs and other active agents can be accomplished through the use of dry powder compositions made from particles containing the drug or active agent. In producing such particles, it is often desirable to combine substances with significantly different physical properties to achieve the desired pharmaceutical effect in patients. Moreover, it is often desirable to produce particles that are a combination of different substances. One way to produce particles containing a combination of different substances is to dissolve the substances in suitable solvents, and then remove the solvents by, for example, evaporatio...

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Application Information

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IPC IPC(8): A61K39/395A61K38/28A61K31/56A61K9/14A61K9/00A61K9/16A61K38/27B01D1/18B01F3/08B01F5/06B01J2/04B01J2/10
CPCA61K9/0075A61K9/1611A61K9/1617A61K9/1688A61K9/1694A61K31/137B01J2/10A61K38/28B01D1/18B01F3/0803B01F5/0619B01J2/04A61K38/27B01F23/405B01F25/43161
Inventor BATYCKY, RICHARD P.JACKSON, BLAIR C.JOHNSTON, LLOYD P.MINTZES, JEFFREY D.PENACHIO, ERNEST E.
Owner CIVITAS THERAPEUTICS
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