@Sadhu2: A normal doctor will tell you that you can't combine alcohol with phenobarbital. Personally back in my bad days I was prescribed phenobarbital + clonazepam + valproate and still was stupid enough to drink 6-8 beers. But my GABAergic tolerance was very high. It also depends if you drink all beers pretty fast or slowly over the day. Pheno is much safer than fast acting barbiturates. But never drink hard liquor like 1,5 bottles of vodka when taking pheno. Never drive even on Phenobarbital alone if that's possible for you.
The most important thing is that you away from the alcohol. Use all help that you can get and also Google this anti-craving drugs: naltrexone, acamprosate, baclofen, topiramate ondansetron, acetylcysteine