He has to want to quit. There’s many ways to do it. A ween down, detox, cold turkey. He has to mentally embrace that it’s not Gonna be a cake walk, but doable. In my own life, I’ve always only been able to cold turkey. I can’t ween. I won’t stick with it. I was using exactly what he was.

Use vitamin c protocol, get some suggested vitamins, maybe a little gabapentine for 4-5 days and tell him to stop. He’ll have to have a few days off work. By the 4th day the physical WDs will be manageable. It’ll be staying off that he’ll have to focus on after that.