Fentanyl is a powerful pain medication. It is an opioid, like morphine, codeine, oxycodone (oxys) and methadone. Fentanyl is most often prescribed as a slow-release patch to people with long-term, severe pain. When used in this way, it can be very effective and safe. Fentanyl more info is much stronger than most other opioids—up to 100 times stro