Pharmaceutical formulations for dry powder inhalers

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/72 (2006.01) A61K 9/14 (2006.01) A61K 31/167 (2006.01) A61K 31/573 (2006.01) A61K 31/58 (2006.01)

Patent

CA 2405767

A powder for use in a dry powder inhaler comprises: i) a fractio n of fine particle size constituted by a mixture of physiologically acceptable excipient and an additive; ii) a fraction of coarse particles; and iii) at least one active ingredient. The powder is suitable for efficacious delivery of active ingredients into the low respiratory tract of patients suffering from pulmonary diseases such as asthma. In particular, the invention provides a formulation to be administered as dry powder for inhalation which is freely flowable, can be produced in a simple way, is physically and chemically stable and capable of delivering accurate doses and/or high fine particle fraction of low strength active ingredients by using a high- or medium resistance device.

La présente invention concerne une poudre destinée à un usage dans un inhalateur à poudre sèche. Cette poudre comprend (i) une fraction de taille particulaire fine, constituée d'un mélange qui est formé par un excipient acceptable d'un point de vue physiologique et par un additif, (ii) une fraction de particules grossières et (iii) au moins une substance active. Ladite poudre permet une distribution efficace de substances actives dans les voies respiratoires inférieures de patients souffrant de maladies pulmonaires, telles que l'asthme. La présente invention concerne notamment une formulation devant être administrée sous forme de poudre sèche à inhaler, à écoulement libre. Cette formulation peut être produite de manière simple, est physiquement et chimiquement stable et permet de distribuer des doses précises et/ou une fraction particulaire très fine de substances actives de faible résistance, par utilisation d'un dispositif de haute ou moyenne résistance.

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