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Data indicate that a single injection typically maintains therapeutic levels for approximately one week [25]
Allergic reactions are very rare, but if you ever experience itching, rash, or difficulty breathing after receiving a B12 injection, please seek immediate medical attention or contact our office right away
FDA's 2024 review states the mechanism of action is still unknown, which limits how confidently any specific physiological effect can be predicted in humans
The usual frequency for intramuscular doses of B12 shots is every 10 days, followed by maintenance doses at varying intervals
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