Yep same stuff, it is the active form of b12, not like b12 cynocobalamin has to be converted by the liver into the active form.
Alcohol is a nerve irritant so cutting back and the B vitamins are propably both helping, best to stop it all together when your able to, if it is beer you drink, all the sugar in it can irritate the nerves too, even some people with idiopathic PN
can have a reaction to a lot of sugar, i used to like a drink myself but give it up because of the neuropathy.