Alcohol for me worked as much as a stimulant (eye-openers in the a.m., etc.) as it was a depressant. I've been drinking a pile of Pepsi Max & Coke Zero this past week which both have lots of caffeine.
Crappy part is with the those said beverages I did some research and discovered that they both have additives that many believe are hard on the liver.
I'd say whatever you need (within reason) in your first few days to stay sober go for it as it would be the lesser of two evils