TRANSDERMAL PATCH FOR ADMINISTERING FENTANYL

摘要

PROBLEM TO BE SOLVED: To provide a method of transdermal administration of fentanyl and an analog thereof for analgesia, and a patch therefor.SOLUTION: A transdermal patch for administering fentanyl or an analog thereof through skin comprises (a) a backing layer and (b) a reservoir disposed on the backing layer. At least a skin contacting surface of the reservoir is adhesive. The reservoir comprises a single phase polymeric composition free of undissolved components containing fentanyl or an analog thereof in an amount sufficient to induce and maintain analgesia in a human for at least three days.