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
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Refrigeration at 28 C is appropriate once the working timeline extends past a month
The effect of parenteral vitamin B12
If results diverge from historical baselines, re-check reconstitution volume and storage history first
What to Expect After a B12 Injection After a B12 injection, you can expect an almost immediate boost in energy