I meant to add that when I was tweeting about how B12 helped my shingles. I used B12 lozenges (Methylcobalamin) before the fever blisters came out... I thought my peripheral neuropathy was coming back.

Anyway, after I tweeted about using B12, a doctor in England tweeted to me that in the old days doctors there prescribed B12 for the neuropathy associated with shingles. He said he hadn't read any documentation, but it was his experience that the practice was wide spread.

I thought that was neat to know.