Particulate composition

A - Human Necessities – 61 – K

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A61K 9/51 (2006.01) A61K 9/107 (2006.01) A61K 9/12 (2006.01)

Patent

CA 2405659

Nanoparticles are prepared from a colloidal system comprising a continuous phase and micelles, the micelles comprising surfactant material. A microemulsion is formed by admixing the colloidal system with a solution of an active material, such as a medicament, dissolved in a solvent wherein the solution forms a disperse phase with the micelles of surfactant material. At least the dispersed phase is quenched to a solid state and the continuous phase and solvent are removed to produce the nanoparticles. The nanoparticles can be incorporated in an aerosol composition suitable for deep lung delivery by means of a metered dose inhaler.

La présente invention concerne des nanoparticules préparées à partir d'un système colloïdal comprenant une phase continue et des micelles, les micelles comprenant une substance tensioactive. Une microémulsion est formée grâce au mélange par addition du système colloïdal avec une solution correspondant à une substance active, telle qu'un médicament, dissoute dans un solvant, la solution formant une phase dispersée avec les micelles de la substance tensioactive. Au moins la phase dispersée est réduite à l'état solide, et la phase continue et le solvant sont éliminés pour produire des nanoparticules. Les nanoparticules peuvent être incorporées à une composition aérosol adaptée à l'administration pulmonaire profonde au moyen d'un inhalateur doseur.

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