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According to WebMD, The more common B12 injection side effects are: Swelling at the injection site Mild dirhhea Itching Swelling in the body Low potassium (weakness, irregular heartbeat) There is a case report of an anaphylactic reaction to a B12 injection in a 55 year old women receiving cyanocobalamin, but these reactions are thought to be rare
Cons Variation in quality There are hundreds of B12 supplements available now, and it can be difficult to know which works, or which is best for you
Modifier and wastage rules align with other biologics: JW for partial vial waste, JZ if no waste
Or do you easily sustain skin redness and swelling
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