Fentanyl is an opioid drug like morphine and heroin. But it is 100 times more powerful than morphine and 50 times than heroin. It is used for pain relief and other medical purposes, like surgery and other painful operations. Fentanyl addiction can cause death and some serious health problems, and also some side effects such as Bone pain, sleeping disorders, vomiting, anxiety, depre... https://secondnewlife.com/fentanyl-addiction/