Sorry but that's not near enough information to go on. I'm not directly assuming that you're using this for recreation but BL does not support dangerous extractions for the sake of getting high. Extracting Fentanyl is a venture fraught with peril. There is zero room for error and doing so by yourself is worse than Russian roulette. I would suggest using the search engine for information already posted and I would cease until enough information can be found to at least elucidate how patches should be cut into very small pieces before moving on to the risky procedure of extraction. Please be Safe..