Recrystallization-free estradiol-containing patch
First Claim
1. A recrystallization-free estradiol-containing patch for the controlled release of estradiol or its pharmaceutically acceptable derivatives alone or in combination with at least one gestagen, comprising a backing layer, an active substance-containing reservoir, and a removable protective layer wherein said reservoir is bonded to said backing layer and contains a pressure-sensitive adhesive comprising 5-25%-wt. ethylcellulose, 50-90%-wt. of esters of non-hydrogenated and/or hydrogenated colophony, and 1-20%-wt. lauric acid.
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Accused Products
Abstract
An active substance-containing patch for the controlled release of estradiol or its pharmaceutically acceptable derivatives alone or combined with gestagens, comprising a backing layer, an active substance-containing reservoir which is bonded thereto and produced by using pressure-sensitive adhesives, and a removable protective layer, is characterized by the fact that the pressure-sensitive adhesive comprises ethylcellulose, esters of non-hydrogenated and/or hydrogenated colophony, and lauric acid.
57 Citations
18 Claims
- 1. A recrystallization-free estradiol-containing patch for the controlled release of estradiol or its pharmaceutically acceptable derivatives alone or in combination with at least one gestagen, comprising a backing layer, an active substance-containing reservoir, and a removable protective layer wherein said reservoir is bonded to said backing layer and contains a pressure-sensitive adhesive comprising 5-25%-wt. ethylcellulose, 50-90%-wt. of esters of non-hydrogenated and/or hydrogenated colophony, and 1-20%-wt. lauric acid.
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17. A recrystallization-free estradiol-containing patch for the controlled release of estradiol or its pharmaceutically acceptable derivatives alone or in combination with at least one gestagen, comprising a backing layer, an active substance-containing reservoir, and a removable protective layer, wherein said reservoir is bonded to said backing layer and contains a pressure-sensitive adhesive consisting essentially of 5-75% wt. ethylcellulose, 50-90% wt. esters of non-hydrogenated and/or hydrogenated colophony and 1-20% wt. lauric acid.
Specification