Ultrams and Vicodin

My husband is hooked on Ultrams (Generic Name: tramadol (TRAM a dol), and Vicodin. This is going on now for a few years and I've had enough. Whenever I confront him on this subject he'll just insist that he's taking them for his back pain. I know that there's got to be some other alternative then taking these meds for the rest of his life and being an addict. I'm scared for his life and our marriage. Anytime I try and talk to him about this, he raises his voice and threatens to leave. He says he knows he's got a problem and he's gonna try and quit on his own by weaning himself off. He says by doing it this way he should bypass the withdrawal part. I don't know how true that is. I suggested that I take him in to get detoxed, but he refuses to do that. he said either we'll do it his way or he's not gonna try and quit at all. He gave me all his pills. so now I have control over how many he gets to take per day. I just hope he really wants this. I don't want to have to leave him, but at the same time I don't want to have to watch him hurt himself anymore. I don't know what to do. I feel like a basket case!