why does a b12 injection hurt Vitamin shots: Uses, benefits, and side effects How Often Should You Have
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Rare but serious: allergic reactions
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Patients must receive folic acid, vitamin B12, and corticosteroids before and during treatment to mitigate certain side effects

These may indicate subacute combined degeneration of the spinal cord, which requires immediate treatment with intramuscular hydroxocobalamin injections and possibly specialist referral

Store it in the fridge, or in a cool, dark place between 525C / 4177F
