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For the 3.2 mg dose used here, add 2.5 mL to an 80 mg vial
Can B12 Injections Cause Serious Allergic Reactions
A 2025 systematic review and meta-analysis of 14 randomized controlled trials concluded that it appears safe and potentially beneficial for improving early neurological recovery after stroke, with a number-needed-to-treat of 7.1 for early NIHSS score improvements (4)
Vitamin B12 deficiency in the longer run can lead to nervous system disorders with sensation changes, loss of power or co-ordination, gut disorders and (rarely) dementia or mental illness
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