I was given synthetic morphine after cancer surgery, I’m allergic to codeine and other opioids so they gave me this but they weren’t totally sure whether it was safe, thankfully I didn’t have any serious reaction but it really made me itch all over and it worried me so I went back to Tylenol extra strength. I never found the withdrawal very difficult at all and I just stopped them, I didn’t take them for long so maybe that’s why, I would definitely get some assistance if you are dependent on them and also I would suggest that you take it very slowly when you do so because there’s no faster way to withdraw from any medication if you want to be successful in your recovery process.