I had my 12 weekly injection today.....thank god. Although, it is a mixed blessing as the injection always makes me vomit. After my loading dose it took 5-6 weeks of the symptoms coming back bit by bit. My husband injected me with cyancobalamine at this point. Made me initially very Ill but I was expecting that. Symptoms improved but started to wain again......tiredness, tripping over words, not being able to say words and chronic stomach pains. I asked the nurse tonight if I could have the injection every 6 weeks but she said "there is no medical evidence to support this" . My question is, is there? I don't want to be injected so often due to the side effects but I feel I need them closer together.