It may very well be one of the "inactive ingredients" in the medicine. Did the brand you were taking change recently? In what form is the medication. Patch im guessing, but im not really sure what all they offer oversees. The don't make the gel patches here in the states anymore as far as I know. I think they still make the Lollypops but those are very uncommon. Its possible you might be taking just a bit too much also. If its a patch, are you wearing it, popping it in your mouth, or doing the worst thing, and injecting?? Not judging if you are. Its just dangerous even in opiate tolerant people.