do b12 injections cause headaches Why I feel worse after a injection? Symptoms if You Take Too

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Some patients feel as though they want more frequent injections, and occasionally we test levels to see if they are receiving adequate replacement, but Im not sure how strong the evidence is to support this. GPs should consider periodic vitamin B12 testing of higher-risk patients who take metformin, even if they dont display symptoms of deficiency, the UK medicines regulator said earlier this year

They come in different strengths and dosing plans

This helps make treatment better

This page is only for those patients of Ivy Grove Surgery If you would like to self-administer B12 injections at home, please let our practice nurse know at the time of your next visit Last update: June 17, 2026 HOW TO SELF-ADMINISTER B12 INJECTIONS AT HOME SHORTCUT ivy.gs/b12 Important warnings Please download and read this safety information letter

With the right support and knowledge, you can take control of your B12 care and keep your body fueled with this essential vitamin