b12 injection vertigo Common & Rare Side Effects of Vitamin Injections Vitamin B12: Understanding Vertigo and
Description
Several factors influence injection site reactions

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Vitamin B 12 deficiency also has been linked to psychiatric disorders, including impaired memory, irritability, depression, dementia and, rarely, psychosis

But the symptoms you're attributing to high B12 are real, and they're worth investigating

But if your B12 level is normal
