Patent ID: 6156335
Filing Date: 2000-12-05
Classification: A61K

Abstract:
A transdermal medicated patch for the extended release of 17.beta.-estradiol to the skin, consisting of pressure-sensitive adhesive copolymers in which the active ingredient is dissolved or dispersed, supported by a water-impermeable foil and covered by a protective liner which is removed at the time of use, wherein the pressure-sensitive adhesive copolymers are obtained by radical copolymerization of 55 to 65 weight % 2-ethylhexyl acrylate 24 to 32 weight % methyl acrylate 3 to 5 weight % acrylic acid 3 to 7 weight % vinyl acetate and 0.7 to 1.5 weight % hydroxyethyl acrylate.