Just got back from the doctors where my son was supposed to be having his third B12 injection after recent diagnosis only to be told that the nurse couldn't give it to him as the doctor had only written up for 12 weekly injections. The nurse said the guidelines are for B12 injections to be given every other day for 2 weeks then every 12 weeks. She tried to get authorisation from a nurse practitioner who would only authorise her to arrange for another B12 blood test. I am so upset for him. He has a needle/blood phobia and looked absolutely distraught. I just said NO he isn't going for a blood test. All this after he has waited a week for his injection. We are now booked in to see another doctor in the morning. Any Advice?