Methods for making pharmaceutical formulations comprising...

A - Human Necessities – 61 – K

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Details

A61K 9/14 (2006.01) A61K 9/16 (2006.01) B01D 1/18 (2006.01) B01J 2/04 (2006.01) A61K 9/00 (2006.01)

Patent

CA 2511313

Methods are provided for making a dry powder blend pharmaceutical formulation comprising (i) forming microparticles which comprise a pharmaceutical agent; (ii) providing at least one excipient in the form of particles having a volume average diameter that is greater than the volume average diameter of the microparticles; (iii) blending the microparticles with the excipient to form a powder blend; and (iv) jet milling the powder blend to deagglomerate at least a portion of any of the microparticles which have agglomerated, while substantially maintaining the size and morphology of the individual microparticles. Jet milling advantageously can eliminate the need for more complicated wet deagglomeration processes, can lower residual moisture and solvent levels in the microparticles (which leads to better stability and handling properties for dry powder formulations), and can improve wettability, suspendability, and content uniformity of dry powder blend formulations.

La présente invention a trait à des procédés permettant la fabrication de préparation pharmaceutique de mélange pulvérulent sec comprenant (i) la formation de microparticules comportant un agent pharmaceutique ; (ii) la mise à disposition d'au moins un excipient sous la forme de particules présentant un diamètre de volume moyen supérieur au diamètre de volume moyen des microparticules ; (iii) le mélange des microparticules avec l'excipient pour former un mélange pulvérulent ; et (iv) le broyage à jet du mélange pulvérulent pour la désagrégation d'au moins une portion des microparticules qui se sont agglomérées, tout en maintenant sensiblement la taille et la morphologie des particules individuelles. Le broyage à jet peut, de manière avantageuse, éliminer la nécessité de procédés de désagrégation par voie humide plus complexes, réduire les niveaux d'humidité résiduelle et de solvant dans les microparticules (qui entraîne une meilleure stabilité et de propriétés de manipulation pour des préparations pulvérulentes sèches), et améliorer la mouillabilité, l'aptitude à la suspension, et l'uniformité de contenu des préparations de mélange pulvérulent sec.

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