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A - Human Necessities – 61 – K

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A61K 9/14 (2006.01)

Patent

CA 2576410

The invention relates to particles for drug delivery by inhalation, said particles incorporating at least one active ingredient which is non- crystalline. The may be a plurality of active ingredients and moreover the outer surface of the particles may be substantially smooth. By providing non- crystalline particles with an outer smooth surface, a substantially accurate dose of active ingredient(s) can, in use of an inhalation device, be delivered each time the device is discharged, with a free flow and non-agglomeration of the particles. This is brought about by the smooth surface and the lack of a periodic ordered structure typical of a crystalline solid. The invention extends to an inhalation composition, and a pulmonary nasal inhalation device including such a composition.

Cette invention se rapporte à des particules pour l'administration de médicaments par inhalation, ces particules incorporant au moins un principe actif qui est non cristallin. On peut prévoir plusieurs principes actifs et, en outre, la surface extérieure des particules peut être essentiellement lisse. En prévoyant des particules non cristallines avec une surface extérieure lisse, une dose très précise du ou des principes actifs peut, au moyen d'un dispositif d'inhalation, être administrée chaque fois que le dispositif est déchargé, avec un écoulement libre et sans agglomération des particules, ce qui est possible grâce à la surface lisse et grâce à l'absence d'une structure ordonnée périodique typique d'un solide cristallin. Cette invention s'étend à une composition d'inhalation et à un dispositif d'inhalation nasale pulmonaire contenant une telle composition.

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