((((SGH))))))
Fear is good for those of us addicted to drugs, especially when we are still trying to buy drugs.
Fear is one thing that got me off meth. Fear of my dealer and fear of being homeless.
Fear motivates us to change. As hard as this is for him it's probably harder on you.
He'll be fine and have time to think and evaluate.
Going off seroquel he should be okay, he may start to feel some of the effects from the effexor, nothing that will kill him, just make him nice and uncomfortable. It's like little zaps and having a bad flu. Not fun, but he may be really looking forward to getting back into rehab!
Hang tough, it will be okay!
That's my experience anyway~