I have b12 jabs every 10weeks but after only 2 weeks of having the jab i have white marks on my finger nails and I'm still so tired. I am 65 and have been having these jabs since i was 45 after being rushed to hospital, them thinking i had crones.
Sorry to hear how unwell you are . Having had a similar experience , I can feel for you . You need more frequent B12 injections . Also a modest folic acid tablet -say 400mcg . I suggest that you join the Pernicious Anaemia Society , where excellent advice can be obtained . They have an excellent forum on Health Unlocked . I obtained such good advice there . I am now well again due to the help i received there .My best wishes to you .
This is the problem with taking medication too long, the body becomes completely dependant on them. The best thing you can do is try alternatives with doctors advice.