Iv been using this site for a long time for information needed before i would use any drug for recreation. iv finally made a profile as i beleave i have some information i beleave would be of use to some people. For the last two months i have been useing Fentanyl matrix membrain patches for pain releafe and at time when the pain would become unbearable i would cut a quarter 50microgam peace off and chew on it for fast release. Now anybody can correct me if they know better as i do not claim to be a pro. But after doing this a few times i have started spitting up peaces of my gum. I know this sounds weird but i beleave it may be doing damage and breaking down tissue. Just a warning i would like to give back to the community. Thanks for all the past advice and i hope this helps other people in the bluelight community. Cheers Dentanyl.