Oral pharmaceutical delivery system with improved sustained...

A - Human Necessities – 61 – K

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A61K 9/22 (2006.01)

Patent

CA 2521574

A solid oral delivery system having improved sustained release properties made of at least one lipid, dry particles including at least one pharmaceutical, and at least one filler, wherein the dry particles are continuously coated by the lipid and form a homogeneous suspension with the lipid, wherein the suspension, when melted, exhibits thixotropic and/or pseudoplastic properties, wherein the suspension is formed into the desired dose by molding or pouring the suspension when in a liquid or semi-liquid state. The process for preparing the present delivery system by melting the lipid, blending the dry particles which include the pharmaceutical, at least one filler and, optionally, flavorings with the melted lipid, and pouring or molding the suspension to provide the solid dose, wherein the suspension, when melted, exhibits thixotropic and pseudoplastic flow properties.

L'invention a trait à un système d'administration par voie orale solide, qui présente des propriétés de libération prolongée améliorées, et qui est constitué d'au moins un lipide, de particules sèches contenant au moins un médicament, et d'au moins un excipient, les particules sèches étant revêtues de manière continue par le lipide et formant une suspension homogène avec ce dernier. La suspension, une fois fondue, présente des propriétés thixotropiques et/ou pseudoplastiques. On forme la suspension en la dose désirée en la moulant ou en la versant lorsqu'elle se trouve à l'état liquide ou semi-liquide. L'invention concerne également un procédé permettant de préparer le système d'administration selon l'invention, qui consiste à faire fondre le lipide, à mélanger les particules sèches contenant le médicament, au moins un excipient et éventuellement des aromatisants, avec le lipide fondu, et à verser ou mouler la suspension afin d'obtenir la dose solide, la suspension, une fois fondue, présentant des propriétés d'écoulement thixotropique et pseudoplastique.

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