Patent ID: 7063859
Filing Date: 2006-06-20
Classification: A61K

Abstract:
1. A flexible transdermal drug delivery system that substantially maintains contact with movement at the topical site of application, comprising (a) a carrier composition layer comprising a therapeutically effective amount of one or more drugs; (b) a flexible, soft backing layer consisting essentially of a cellular foam which is substantially permeable to the carrier composition; (c) a barrier layer substantially compatible with and impermeable to the drug and carrier composition and consisting essentially of a film of thermoplastic polymers and rubbers having an average thickness of about 0.1 mils to about 4.0 mils and an inner and outer surface, the outer surface of which is joined to the backing layer by means of a low molecular weight adhesive or by co-extrusion, and the inner surface of which is in contact with the carrier composition.