Solubility parameter based drug delivery system and method for altering drug saturation concentration
First Claim
1. A dermal composition, comprising a blend of:
- (a) a polyacrylate and a second polymer selected from the group consisting of a polysiloxane and a hydrocarbon polymer; and
(b) a therapeutically effective amount of a drug for transdermal administration,wherein the composition is a pressure-sensitive adhesive and the polyacrylate and the second polymer modulates the permeation rate of the drug through the dermis, and wherein the composition excludes a polyethylene/vinyl acetate copolymer.
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Abstract
The method of adjusting the saturation concentration of a drug in a transdermal composition for application to the dermis, which comprises mixing polymers having differing solubility parameters, so as to modulate the delivery of the drug. This results in the ability to achieve a predetermined permeation rate of the drug into and through the dermis. In one embodiment, a dermal composition of the present invention comprises a drug, an acrylate polymer, and a polysiloxane. The dermal compositions can be produced by a variety of methods known in the preparation of drug-containing adhesive preparations, including the mixing of the polymers, drug, and additional ingredients in solution, followed by removal of the processing solvents. The method and composition of this invention permit selectable loading of the drug into the dermal formulation and adjustment of the delivery rate of the drug from the composition through the dermis, while maintaining acceptable shear, tack, and peel adhesive properties.
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Citations
75 Claims
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1. A dermal composition, comprising a blend of:
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(a) a polyacrylate and a second polymer selected from the group consisting of a polysiloxane and a hydrocarbon polymer; and (b) a therapeutically effective amount of a drug for transdermal administration, wherein the composition is a pressure-sensitive adhesive and the polyacrylate and the second polymer modulates the permeation rate of the drug through the dermis, and wherein the composition excludes a polyethylene/vinyl acetate copolymer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 46, 47, 48, 49, 52, 53, 54, 55, 56, 57, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 74, 75)
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43. A pressure-sensitive adhesive composition for dermal administration of a drug comprising a blend of:
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(a) two polymers consisting essentially of about 2% to about 96% by weight of a polyacrylate and about 98% to about 4% by weight of a polysiloxane, the two polymers being in an amount of about 99% to about 50% by weight of said composition; (b) a drug in the amount of about 0.3% to about 50% by weight of said composition; (c) an effective amount of a co-solvent for the drug, said amount being up to about 30% by weight of said composition; and (d) an effective amount of an enhancer, said amount being up to about 20% by weight of said composition. - View Dependent Claims (44)
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45. A process for transdermally administering to a mammal a therapeutically effective amount of a drug, comprising the steps of applying a composition for transdermal administration of the drug to the skin of said mammal, and maintaining said composition in contact with said skin until said effective amount of said preselected drug is transdermally administered, wherein said composition comprises a blend of
(a) two or more polymers which includes a polyacrylate and one or more of a polysiloxane, polyvinylchloride, polyvinylidene chloride, polychloroprene, polyacrylonitrile, nylon-6,6, epoxy resin, a copolymer of polybutadiene/acrylonitrile and a hydrocarbon polymer, said at least two polymers have corresponding solubility parameters and are blended in a proportion, resulting in a net solubility parameter of the blend; - and
(b) said preselected drug, wherein the composition is a pressure-sensitive adhesive wherein the net solubility parameter of the blend determines the solubility of the preselected drug in the blend, and wherein the composition excludes a polyethylene/vinyl acetate copolymer. - View Dependent Claims (58, 59, 60, 73)
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50. A dermal composition, comprising a blend of:
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(a) a polyacrylate having a first solubility parameter and a second polymer selected from the group consisting of polysiloxane and hydrocarbon polymers having a second solubility parameter, wherein the first and second solubility parameters are different from one another by an increment of at least 4 (J/cm3)1/2 ; and (b) a therapeutically effective amount of a drug for transdermal administration, wherein the composition is a pressure-sensitive adhesive and the polyacrylate and the second polymer modulates the permeation rate of the drug through the dermis, and wherein the composition excludes a polyethylene/vinyl acetate copolymer. - View Dependent Claims (71)
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51. A composition for dermal administration of a drug, comprising a blend of:
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(a) a polyacrylate and a second polymer selected from the group consisting of polyvinylchloride, polyvinylidene chloride, polychloroprene, polyacrylonitrile, nylon-6,6, epoxy resin, and a copolymer of polybutadiene/acrylonitrile; and (b) a therapeutically effective amount of a drug for transdermal administration, wherein the composition is a pressure-sensitive adhesive and the polyacrylate and the second polymer modulates the permeation rate of the drug through the dermis, and wherein the composition excludes a polyethylene/vinyl acetate copolymer. - View Dependent Claims (72)
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Specification