I think the best thing for you is to see a doctor and talk honestly about what you are feeling and how much you are drinking. I have never heard of the medicines you are taking, though even if I had it would not be wise of me (and against forum rules) for me to advise you on them. I was prescribed Campral to deal with cravings and I do feel as if it helps me with physiological cravings. I do not think it helps with psychological cravings. So, in the end, I do have a help because I am not dealing with the physiological part of my addiction, which I do feel is a big part, but I still am on my own for the psychological part.
So, in summary, see your doctor and also read the following book: Under the Influence: Understanding the Myths and Realities of Alcoholism
Best of luck to you. It isn't easy, this I know. But I absolutely would not recommend messing around with drugs, prescribed or otherwise, without talking to a professional.