Transdermal patch for external use comprising fentanyl

摘要

A transdermal patch for external use having a backing layer and a pressure-sensitive adhesive layer formed on one surface of the backing layer, which contains polyisobutylene, a mineral oil and fentanyl employed as the active ingredient in the pressure-sensitive adhesive layer and in which the contents of polyisobutylene and fentanyl in the pressure-sensitive adhesive layer respectively range from 75.2 to 94.2% by mass and 1 to 6% by mass while the content of the mineral oil is from 0.25 to 0.05 parts by mass based on polyisobutylene. This patch can be easily produced, has a long-lasting effect and is excellent in adhesion to the skin and tolerability against movement to the body parts.