Anxiety, body aches, diarrhea; rapid heartbeat, fever, runny nose or sneezing, chills, sweating, yawning, anorexia, nausea or vomiting,; nervousness, irritability, shivering or trembling, stomach cramps, insomnia, and weakness....I also had leg cramps and nervous leg syndrome coming off of it.

Of course I used oxycodone to curb the withdrawels of the fentanyl then came off the oxy. Coming off that was worse then the fentanyl for me.