Some common side effects of Vitamin B12 injections include pain, redness, and swelling at the injection site
If the vial is exposed, keeping it in a dark area of the refrigerator is a simple precaution
This is particularly relevant for patients with pernicious anaemia, where intrinsic factor deficiency prevents adequate oral absorption
Early haematological response begins with reticulocytosis (increased production of immature red blood cells) typically by day 3-4 of treatment , particularly with injectable forms, though the full resolution of symptoms may take several weeks to months
How often you get B12 shots can change based on your needs and how well you respond to treatment
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