Extendible transdermal therapeutic system

Details Extendible transdermal therapeutic system Extendible transdermal therapeutic system

A - Human Necessities

61

K

A61K 9/70 (2006.01) A61L 15/18 (2006.01)

Patent

CA 2279994

The invention relates to a transdermal therapeutic system containing active ingredients, comprising a non-adhesive back layer, a reservoir layer containing active ingredients and a self-adhesive surface layer facing the skin, which possibly has a detachable protective layer. Said therapeutic system is characterized in that it has an elastic, or plastically extendible, diffusible back layer with a metal coating, in particular one made of vaporized metal, formed by layer growth, which serves as a permeable barrier for active ingredients and additives contained in the reservoir layer.

L'invention concerne un système thérapeutique transdermique contenant un principe actif, qui comprend une couche de base non adhésive, une couche réservoir contenant le principe actif et une surface auto-adhésive faisant face à la peau, ainsi qu'éventuellement une couche de protection amovible. Ce système se caractérise en ce qu'il comporte une couche de base diffusible élastique ou extensible de manière plastique, avec une couche de métal formée par croissance laminaire, notamment une couche de métal vaporisé, faisant office de barrière perméable pour des substances auxiliaires et des principes actifs de la couche réservoir.

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