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Without this, contamination risk increases dramatically with each use of the vial
According to NICE Clinical Knowledge Summaries, once B12 deficiency is adequately treated and symptoms resolve, routine monitoring of serum B12 levels is generally unnecessary, as clinical response is the primary indicator of treatment effectiveness
What can go wrong Pain, swelling and a small lump The most common outcome of a rushed or badly angled injection is local irritation: soreness, redness, a small firm lump or a bruise
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