Patent ID: 8916191

Claim:
A transdermal drug delivery system comprising a carrier composition comprising a blend of: (a) a polymer composition comprising at least one acrylic-based polymer polymerized from monomers that consist of: (i) soft acrylic monomers selected from the group consisting of 2-ethyl hexyl acrylate, isobutyl acrylate, ethyl acrylate, butyl acrylate, dodecyl methacrylate, 2-ethylhexyl methacrylate, 2-ethoxyethyl acrylate, isopropyl acrylate, and 2-methoxyethyl acrylate, in an amount of 20% by weight of the acrylic-based polymer; and (ii) hard acrylic monomers selected from the group consisting of methacrylate, N-butyl acrylate, acrylic acid, butyl methacrylate, ethyl methacrylate, methyl methacrylate, hexyl methacrylate, and methyl acrylate, in an amount of 80% by weight of the acrylic-based polymer; and (b) a drug in an amount of from 0.1% to 50% by weight of the carrier composition, wherein all acrylic-based polymers present in said polymer composition of the transdermal drug delivery system are polymerized from monomers that consist of monomers selected from the group consisting of said soft and hard acrylic monomers (i) and (ii).