The fentanyl was the ticket for pain mgt - w/breakthrough meds to assist - it worked, but I'd add that coming off the fentanyl was a real mess. At the last 10 to 15 mcgs and lower, I couldn't sleep, couldn't get comfortable, legs jumping/twitching and lots of up/down to bathroom to urinate - all night long every 30 minutes - for 3-5 weeks. Coming off that was one of the worst treatment outcomes. ...However, given the rough course and what pain I experienced, I can't imagine not having it when I needed it... those 3-5 weeks of withdrawal were probably worth the 3-4 months of pain management.