Transdermal fertility control system and process
First Claim
1. A transdermal fertility-controlling polymer matrix dosage unit comprising:
- (a) a backing layer which is substantially impervious to the fertility-controlling estrogen and progestin hormones to be delivered transdermally;
(b) a polymer matrix disc layer which is adhered to said backing layer and which has microdispersed therein effective dosage amounts of fertility-controlling estrogen and progestin hormones said estrogen being selected from the group consisting of 17-beta estradiol, ethinyl estradiol and biocompatible derivatives thereof convertible to said estradiols, progestin being selected from the group consisting of levonorgestrel and norethindrone, said polymer being bioacceptable and permitting said hormones to be transmitted for transdermal absorption, said hormones being stable in said polymer matrix and being transdermally absorbed simultaneously to provide at least minimum effective daily doses of said hormones to effect fertility control; and
(c) an adhesive means for securing the dosage unit for transdermal absorption to the subject treated.
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Accused Products
Abstract
Transdermal fertility-controlling absorption polymer matrix dosage units have been developed which comprise a backing layer, an adjoining layer of a solid polymer matrix in which minimum effective daily doses of an estrogen and a progestin are microdispersed and released for transdermal absorption. Presently preferred is use of the natural estrogen, 17-beta-estradiol, and of the progestin, levonorgestrel. The units have a biologically acceptable adhesive polymer layer. The polymer matrix as well as the adhesive layer can have dispersed one or more skin permeation enhancers. Dosage units are provided which transdermally deliver at least minimum daily doses of the estrogen and progestin for multiple days, such as for one week. The invention also provides a process of fertility control using the novel polymer matrix dosage units for the first three weeks of consecutive menstrual cycles of the subject desiring fertility control.
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Citations
30 Claims
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1. A transdermal fertility-controlling polymer matrix dosage unit comprising:
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(a) a backing layer which is substantially impervious to the fertility-controlling estrogen and progestin hormones to be delivered transdermally; (b) a polymer matrix disc layer which is adhered to said backing layer and which has microdispersed therein effective dosage amounts of fertility-controlling estrogen and progestin hormones said estrogen being selected from the group consisting of 17-beta estradiol, ethinyl estradiol and biocompatible derivatives thereof convertible to said estradiols, progestin being selected from the group consisting of levonorgestrel and norethindrone, said polymer being bioacceptable and permitting said hormones to be transmitted for transdermal absorption, said hormones being stable in said polymer matrix and being transdermally absorbed simultaneously to provide at least minimum effective daily doses of said hormones to effect fertility control; and (c) an adhesive means for securing the dosage unit for transdermal absorption to the subject treated. - 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)
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Specification