he will only have the mental wd from going cold turkey, he will have cravings, anxiety and mild insomnia, so see about finding some hydroxyzine(a older generation anti-histamine, that most docs put you on when you are low enough on a benzo to replace going cold turkey, it is a
muscle relaxant, mild euphoriant, and mainly anti-anxeity drug, it is very effective, many patients happily have switched over from 1mg xanax to 50-100mg hydroxyzine)..i had to do it and it worked well...