Lots of us self-inject and times between injections seem to vary hugely! I know I've seen posts from people injecting once or twice per day, and others who do it once a month. You could follow the guideline of every other day until no further improvement, then space them out a bit.

Personally, I started every fortnight, but I now inject whenever I feel the need, which is probably about 6-8 days. I inject just when I'm feeling the 'edge' of symptoms - when I am well and gloriously unstressed (this is a rare treat!), I can go a little longer. If I'm busy or a bit under the weather, I need it a bit sooner.

You can't over-do B12. Worst that happens is that you have slightly expensive B12-pee

I also self inject and now it's every 4-5 days and to be honest I've never looked back! I've tried to space injections out longer but symptons start creeping back so I just stick with what works for me. Good luck.

First of all, do you have neurological symptoms? These can include numbness, pins and needles and balance problems? If you do, your GP should be treating you as per BNF/NICE guidelines of injections on alternate days until no further improvement, then to continue every 2 months.

The guidelines say not to retest after treatment has commenced as the blood serum result will be high. They should be checking symptoms, not blood.

Have they confirmed the cause of your b12 deficiency? Do you know your b12 result before treatment? Are you taking folic acid or folate and iron to help with absorption of the b12? You need to know your levels first though, particularly with ferritin, the iron stores.

I self inject every other to keep balance problems and swimming head under control. If I miss a day, it affects my walking that quickly. I've now been injecting for 9 months and it's become an easy routine. The fatigue and lethargy hasn't gone as I found out fairly recently that I have Hashimoto's but the neurological symptoms have been so much better.

I started on hydroxo sublingual tablets first to check I was on the right track (methyl b12 didn't help me). I noticed an improvement with the tablets after the first one, then it continued to improve very quickly with the injections.

There's so much really helpful information on here from other posts. It really is worth self injecting as so many GPs are taught so little about b12 deficiency. You do not want to run the risk if you do have neurological symptoms that they become permanent.

I am also b12 deficient. How do you learn to self inject. At the moment I still get injections every other day for neuro problems but drs are wanting me to have longer gaps now. So want to learn to self inject.