Patent ID: 8545873
Filing Date: 2013-10-01
Classification: A61K,A61P

Abstract:
1. A transdermal patch, comprising: a backing; and an adhesive layer laminated on the backing, the adhesive layer comprising a tackifier present in an amount of 15% to 50% by mass of the adhesive layer, the tackifier comprising a rosin-based resin present in an amount, and a petroleum resin present in an amount, the said amount of petroleum resin present being 1/3 to 4 times the said amount of rosin-based resin by mass, diclofenac sodium present in an amount of 0.1-40% by mass of the adhesive layer, and polyethylene glycol present in an amount of 0.5-20% by mass of the adhesive layer, wherein the polyethylene glycol has an average molecular weight in a range selected from the group consisting of 1300-1600, 2600-3800 and 7300-9300.