Anaphylactic reactions to thiamine are exceedingly uncommon (estimated incidence well below 1 %), but they have been documented
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
The needle will be inserted at a 45 degree angle, just below your skin, as opposed to deep in your muscle
Because B12 is critical for proper nervous system function, a deficiency can lead to neurological symptoms, such as confusion, poor memory, depression, and difficulty maintaining balance (Serin, 2019)
Vitamin B12 deficiency is the dominant nutritional cause of hyperhomocysteinemia in a folic acid-fortified population