Composition for the Transdermal Delivery of Fentanyl

摘要

The present invention relates to a transdermal drug delivery composition comprising
(a) a copolymer comprising
(i) one or more A monomers selected from the group consisting of alkyl acrylates containing 4 to 12 carbon atoms in the alkyl group and alkyl methacrylates containing 4 to 12 carbon atoms in the alkyl group; and
(ii) one or more ethylenically unsaturated B monomers copolymerizable with the A monomer; and
(b) about 8% by weight fentanyl based on the total weight of the composition;
wherein the composition is substantially free of undissolved fentanyl.