"Having chronic pain in my whole spine they gave me the Fentanyl patch they started low dosage then they moved me up to 75mg. At this time in my life I was also had hot flashes. I seen no warnings nothing about that. Long story short after the second day I started withdrawing and that people is not a pretty site. I had no idea what was going on. So I never went back on it. There should be a warning to all doctors and pharmacies. I had to pull it off the internet to show my pharmacy."