Fentanyl is a prescription analgesic for moderate to severe pain. Often used in cancer treatment. It does not come in pill form. Its a patch that you put on your arm. There have been some bad patchs put out that have a "hole" in them. The anlagesic is released to soon and some folks have experienced overdoses. It is also used illegaly. Especially bad if you add alcohol to it. I would expect that its more difficult to get than oxycodone. There is a liquid form that is used for epidural injections. I recently had two box's of them turned into me. I sent them back to the pharmacy to be destroyed.