Anhydrous multiphase gel system

A - Human Necessities – 61 – K

Patent

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Details

A61K 8/06 (2006.01) A61K 9/107 (2006.01) A61P 17/00 (2006.01) A61Q 19/00 (2006.01)

Patent

CA 2620451

The invention relates to an anhydrous multiphase gel system consisting of an outer lipid matrix and of an inner phase gelled by means of polymer, obtained by: a) melting the lipid phase while forming a liquid lipid phase; b) mixing and homogenizing polymers or polymer blends that are capable of swelling while forming a polymer phase to be dispersed; combining the polymer phase with the liquid lipid phase and homogenizing the phases, and; d) cold stirring the phase mixture until forming a solid gel-like mixed structure of the entire system. The anhydrous multiphase gel system is particularly suited for accommodating poorly soluble active substances in high concentrations and for topical and transdermal applications. The described system is characterized as an EDRS Entrapped Drug Reservoir System .

L'invention concerne des systèmes gel-multiphase anhydres constitués d'une matrice lipide externe et d'une phase interne délivrée par un polymère. Pour obtenir ce système, on effectue a) la fusion de la phase lipide pour obtenir une phase lipide liquide, b) le mélange et l'homogénéisation de polymères ou de mélanges polymériques gonglables pour obtenir une phase polymérique dispersible, c) la réunion de la phase polymérique et de la phase lipide liquide et l'homogénéisation de ces phases et d) le refroidissement en remuant du mélange de phases jusqu'à l'obtention d'une structure de mélange gélifiée solide du système global. Le système gel multiphase anhydre convient particulièrement pour absorber des principes actifs solubles en concentrations élevées et mettre à disposition des applications topiques et transdermiques. Le système selon l'invention est désigné comme système à réservoir de médicament piégé Entrapped Drug Reservoir System-EDRS .

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