PA diagnosed - given 5 loading doses and then told three months. Symptoms returned, peripheral neuropathy was confirmed by a neurologist. I had terrible pains in feet and legs. I was reluctantly given one before that time. But I wanted everything laid out and eventually found a haematologist who when seeing my blood results wrote to my gp and said I needed more frequent injections of B12 because of the severe b12 deficiency and neurology symptoms. I had a b12 injection 10 days ago and symptoms back with a vengeance - dreadful in the night especially. I have just contacted by gp because I am going to Canada on Thursday and the pain in awful. she was furious with me for asking - told me I was pressurising her - no guidelines for more frequent injections. No to b12 (you would overdose) I said my information is that it is not possible to overdose on b12 - she went crazy when I tried to quote that with neurological symptoms there can be permanent damage if not treated. I am in tears as I write this - heaven only knows what to do now.