Multilayer pharmaceutical form with a matrix which...

A - Human Necessities – 61 – K

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

A61K 9/20 (2006.01) A61K 9/50 (2006.01) A61K 47/12 (2006.01)

Patent

CA 2544487

The invention relates to a multilayer dosage form for the controlled release of active substances, which substantially comprises a) optionally a neutral core (nonpareilles), b) an inner control layer, comprising a modulatory effective substance that is embedded in a matrix that influences release of a modulatory substance, said matrix comprising pharmaceutically acceptable polymers, waxes, resins and/or proteins and optionally an active substance, c) an active substance layer, comprising a pharmaceutically active substance and optionally a modulatory effective substance, d) an outer control layer, comprising at least 60 % by weight of one or more mixtures from a plurality of (meth)acrylate copolymers, 98 to 85 C1 to C4 alkyl esters of the (meth)acrylic acid and 2 to 15 % by weight of methacrylate monomers with a quaternary ammonium group in the alkyl group, and optionally up to 40 % by weight of additional pharmaceutically acceptable polymers. The dosage form is further characterized in that the layers additionally contain, in a manner known per se, pharmaceutically common adjuvants.

L'invention concerne une forme galénique pour la libération contrôlée de principes actifs, contenant principalement a) éventuellement un noyau neutre (nonpareilles), b) une couche de contrôle intérieure, contenant une substance à effet modulateur, qui est incorporée dans une matrice influant sur la libération de la substance à effet modulateur, ladite matrice contenant des polymères, cires, résines et/ou protéines, pharmaceutiquement acceptables, ainsi qu'éventuellement un principe actif, c) une couche de principe actif contenant un principe actif pharmaceutique et éventuellement une substance à effet modulateur, d) une couche de contrôle extérieure, contenant au moins 60 % en poids d'un copolymère de (méth)acrylate ou d'un mélange de plusieurs copolymères de (méth)acrylate, constitué(s) de 98 à 85 esters d'alkyle C1-C4 d'acide(méth)acrylique et de 2 à 15 % en poids de monomères de méthacrylate comportant un groupe ammonium quaternaire dans le radical alkyle, et éventuellement jusqu'à 40 % en poids d'autres polymères pharmaceutiquement acceptables, les couches pouvant contenir en outre, et de manière connue en soi, des auxiliaires usuels dans le domaine pharmaceutique.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Multilayer pharmaceutical form with a matrix which... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multilayer pharmaceutical form with a matrix which..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multilayer pharmaceutical form with a matrix which... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1785196

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.