Pernicious Anaemia Society
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B12 needles and storage question

Hi I was wondering if someone could give me some advice on B12 injections.

I’ve been buying Hydroxocobalamin which comes in 2Mg ampoules and been injecting it subcutaneously daily using insulin needles which have a maximum capacity of 500Mcg.

My question is, is it ok to use the whole ampoule and prefill 4 syringes at a time and keep them in the fridge - to be used over the following 4 days? Alternatively, once the ampoule has been opened does it have to be used straight away or again can it be stored somehow for future use.

Sorry but I’m quite new to this so I’m not sure what the correct procedure is.

Thanks,

Richard

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I think you mean that you are using 0.5 ml syringes . No , Its not advisable to fill 4 syringes and use 3 later . It's best used up in one go . You need some 2ml syringes ( medisave.uk ) Buying them in bulk is not expensive .

The ampoule should be used straight away once opened . Best wishes.

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Thanks for the reply yes I presumed that was the case but thought it worth checking (and sorry for my terrible maths!) so rather than doing daily injections it would be fine to do a larger weekly one?

Richard

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Well I can only say that I inject ( 1ml) weekly and I'm keeping very well ! Don't forget that you need folate/folic acid as well, for the B12 to work it's magic !

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How do you take the folate/folic acid? (that's B9 I take it?)

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Well , I do eat plenty of green leafy veg and peas , (folate) but I also take a daily multivitamin and mineral tablet which contains 400 mcg of folic acid which is 100 % of the daily recommended allowance . Yes, folate / folic acid is also known as Vitamin B9 .

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