Just read this posting and now know what your son/daughter are on.
Let's talk about your daughter first -how is she doing right now? is she using anything for withdrawal and what was she on - pain pills?
I don't know of one. But I bet there is one out there. Someone here will have better information for you shortly. This site would be better than none. You need a sounding board? You have one here. And I think that you might be quite surprised at the commonality of the struggle that we are all in. QA lot of folks ae on and in that same boat. You are far from alone.