Welcome drink2much, 
Hi from California!
I strongly recommend you read the book: 
http://www.thecureforalcoholism.comTo answer some of your questions, per the book start with 25 mg for 2 days then move up to 50 mg.  For me personally, 25 mg was too high and I had to start with 12.5.
Someone here had a good link for drug interactions, but I can't seem to find it.
I am honest about how much I drink.  There is a difference in how units are calculated between the USA and the UK.
Here is a thread about it: 
http://www.thesinclairmethod.com/community/viewtopic.php?f=7&t=282Forget AA, the Sinclair method can cure you!