Solid matrix system for transdermal drug delivery
First Claim
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1. A transdermal drug delivery device for administering at least one steroid drug to an area of skin or mucosa, wherein the device consists of a first layer laminated to a second layer, whereinsaid first layer consists of a layer of a backing material which is substantially impermeable to the at least one steroid drug;
- andsaid second layer consists essentially of a therapeutically effective amount of the at least one steroid drug, and an adhesive matrix wherein said second layer is essentially free of a skin penetration rate enhancer, and wherein the adhesive matrix comprises a copolymer of 2-ethylhexyl acrylate and at least one comonmer selected from the group consisting of vinyl acetate, acrylic acid, and methyl acrylate.
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Abstract
A matrix for containing drugs for transdermal delivery systems is disclosed. The matrix, formed of a skin-adhesive acrylate copolymer, attains high rates of drug delivery without the addition of drug delivery rate enhancers. In preferred embodiments the matrix is used to administer steroids, in particular estradiol. Water-soluble polymers may be added as well.
146 Citations
25 Claims
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1. A transdermal drug delivery device for administering at least one steroid drug to an area of skin or mucosa, wherein the device consists of a first layer laminated to a second layer, wherein
said first layer consists of a layer of a backing material which is substantially impermeable to the at least one steroid drug; - and
said second layer consists essentially of a therapeutically effective amount of the at least one steroid drug, and an adhesive matrix wherein said second layer is essentially free of a skin penetration rate enhancer, and wherein the adhesive matrix comprises a copolymer of 2-ethylhexyl acrylate and at least one comonmer selected from the group consisting of vinyl acetate, acrylic acid, and methyl acrylate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 16, 17, 18, 19, 20, 21, 22, 23)
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13. A transdermal drug delivery device for administering at least one steroid drug to an area of skin or mucosa, wherein the device consists of a first layer laminated to a second layer, wherein
said first layer consists of a layer of a backing material which is substantially impermeable to the at least one steroid drug; - and
said second layer consists essentially of a therapeutically effective amount of the at least one steroid drug and an adhesive matrix, wherein said second layer is essentially free of a skin penetration rate enhancer, and wherein the adhesive matrix comprises a water soluble polymer, a copolymer of 2-ethylhexyl acrylate and at least one comonomer selected from the group consisting of vinyl acetate, acrylic acid, and methyl acrylate. - View Dependent Claims (24, 25)
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14. A transdermal drug delivery device for administering at least one steroid drug to an area of skin or mucosa, wherein the device consists of:
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(a) a layer of backing material which is substantially impermeable to the at least one steroid drug; (b) a matrix layer essentially free of a skin penetration rate enhancer said matrix consisting essentially of a therapeutically effective amount of the at least one steroid drug and a body of an adhesive resin, and wherein the adhesive resin comprises a copolymer of 2-ethylhexyl acrylate and at least one comonomer selected from the group consisting of vinyl acetate, acrylic acid, and methyl acrylate; and (c) between the backing material and matrix, a drug reservoir for delivering additional amounts of the at least one steroid drug to the adhesive matrix. - View Dependent Claims (15)
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Specification