--alcohol is not good for nerves--especially already damaged ones.

There is some controversy in the field as to whether a large degree of alcohol consumption by itself can casue neuropathy, or whether alcohol related neuropathy is primarily malnutritional (often from a lack of B-vitmains leached from the sytem by heavy consumption). But it's probably prudent to cut down/stop drinking if one has nerve damage--for any reason, so as not to exacerbate things.