Using alcohol to "cure" agoraphobia isn't going to work. It isn't. I've dealt with crippling agoraphobia for the past 3 years, and I'm slowly emerging with the help of individual counseling, group support, and taking my recovery/healing into my own hands.
When did your symptoms begin? Who diagnosed your condition? What techniques (aside from using substances) are you currently practicing?
There is no such thing as a "one-and-done" approach to ANY emotional/behavioral issue. There isn't. Some people will insist that hypnotism is the answer, and others will insist that adding iodine will cure whatever ails us. None of it is true. It's only true, in part, when combined with various tools and techniques of recovery and healing. The agoraphobia didn't develop because I was missing a key nutritional element, nor did it develop because I had parasites. It developed purely because of my own personal issues and fears. And, all behavioral/emotional issues like that can be managed, but only through using a variety of approaches, not just one.
I would stronly suggest that you begin with a complete physical exam - labs, etc., - to determine if there are any physical issues that might be contributing to your level of anxiety. Then, I would strongly suggest that you seek a trained, licensed, and recommended counseling therapist that specializes in agoraphobia. If you cannot afford one, or you're unable to find one, contact your local mental health hotline for further assistance. Then, I would suggest keeping a log of your anxiety level - note dates, times, triggers, and outcomes. Then, I would recommend keeping a journal of your FEELINGS - how you are feeling and where you believe the feelings came from. I've written this in my CZ blog, but it might be of some use, here. There are only 4 true and recognized emotions: glad, sad, mad, and afraid. Everything else is secondary and more complex. So, focus on those four to determine what you're really feeling, why, and where it came from.
Best wishes to you on your journey of recovery and healing.