I don't know all the details, but I do know that you need to be in withdrawal before using it.
I don't have any experience with those types of drugs, but I do want to offer you some support and you're in the right place for that. There are many different types of addicts here and we're all helping each other the bast we can.
I wish you all the luck in the world, take care of yourself!
Feel A Hug!
~shel~