EP0611567A1
Expired / Lapsed
EP
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Ultrafine powder for inhalation and production thereof
Assignee: Teijin Ltd
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Filing: 1993-06-11
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Granted: —
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Expires: 2013-06-11
Abstract
Abstract An ultrafine powder for inhalation to be transferred mainly to the lower airway, which comprises a drug and hydroxypropylcellulose and/or hydroxypropylmethylcellulose and wherein the particles having diameters in the range of 0.5-10 µm account for 80 wt.% or above.
Inventors
- 👤 Kiyoyuki Sakon
- 👤 Masahiro Sakagami
- 👤 Yuji Makino
- 👤 Yoshiki Suzuki
- 👤 Hideki Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 18:36
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/007; A61K9/0073; A61K9/0075
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
44 words
An ultrafine particle powder for inhalation comprising at least one cellulose lower alkyl ether selected from the group consisting of hydroxypropyl cellulose and hydroxypropyl methyl cellulose, and a medicament, at least 80% of said powder having a particle size of 0.5 to 10 µm.
Claim 2
Dependent Claim
42 words
An ultrafine particle powder for inhalation according to claim 1, wherein said ultrafine powder particle powder for inhalation comprises 20 to 99.8% by weight of said cellulose lower alkyl ether and 0.2 to 80% by weight of said medicament, per particle thereof.
Claim 3
Dependent Claim
24 words
An ultrafine particle powder for inhalation according to claim 1 or 2, wherein said medicament is uniformly dispersed within each of the particles thereof.
Claim 4
Dependent Claim
45 words
An ultrafine particle powder for inhalation according to claim 1, 2, or 3, wherein said medicament is selected from the group consisting of steroids, antiallergics, bronchodilators, medicaments for chemotherapy of infective diseases, antitussives, elastase inhibitors, antineoplastic medicaments, cardiovascular medicaments, physiologically active peptide proteins and vaccines.
Claim 5
Dependent Claim
22 words
A method for the production of the ultrafine particle powder for inhalation according to claim 1, comprising the step of spray drying.
Claim 6
Dependent Claim
16 words
A powder preparation for inhalation comprising the ultrafine particle powder for inhalation according to claim 1.
Claim 7
Dependent Claim
31 words
A powder preparation for inhalation according to claim 6, wherein said powder preparation for inhalation comprises the ultrafine particle powder according to claim 1, and a dispersing agent and/or a diluent.
References Cited (Backward Citations)
No citation records indexed.
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