Sorry, I had the same reaction to the Fentanyl
Patch. With each application the red raised hive like rash became worse and in
short time spread to my entire back where I was applying them. My physician said I was allergic to the adhesive on the patch, not the Fentanyl. She tried a potent cortisone cream to help the reaction but that too failed. I cannot take Fentanyl because of the severe adhesive allergic reaction.