I started b12 shots in September 08 and quit drinking a couple weeks later. After 4 weeks, when the shots stopped, I took 5mg SL b12 and still am.

So here it is, 6 months later, and there has been some improvement in my feet, my brain fog and vision problems have mostly gone away, depression has definitely gone away, but there is no way of knowing if the improvement was because of taking b12 or my quitting drinking. Or a combination of both.

I saw a neurologist a couple weeks ago, and find it curious that he never even asked me if I drank, and wasn't particularly interested in knowing that I was/am b12 deficient. He seems to be as clueless as my regular doctor.