Polymeric adhesive matrix with salified carboxylic groups...

A - Human Necessities – 61 – K

Patent

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A61K 9/70 (2006.01) A61K 31/00 (2006.01)

Patent

CA 2576087

Polymeric matrices for the controlled release of medicaments for the topical transdermal use comprising copolymers of acrylic and/or methacrylic acid or esters thereof having a Tg lower than 0~C, whose free carboxy groups are salified with compatible organic or inorganic bases. The matrices of the invention allow to prepare therapeutical systems for the controlled-release of active principles through the transdermal route, thus solving stability, solubility and/or bioavailability problems of the active ingredient within the matrix.

L'invention concerne des matrices polymères utilisées pour la libération régulée de médicaments, pour une utilisation transdermique topique, qui comprennent des copolymères d'acide acrylique et/ou méthacrylique ou des esters dudit acide, à température de transition vitreuse inférieure à 0 °C, dont les groupes carboxy sont salifiés avec des bases organiques ou inorganiques compatibles. Les matrices selon l'invention permettent de préparer des systèmes thérapeutiques pour la libération régulée de principes actifs par voie transdermique, ce qui permet de résoudre les problèmes de stabilité, de solubilité et/ou de biodisponibilité du principe actif dans la matrice.

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