side effects of b12 injections in humans Shots: Vitamin B12 Benefits, Uses, Risks can you feel sick after

Typically, we do not recommend recapping now because this has actually been inside someone and so it could have some blood and body fluids on it

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As this product contains benzyl alcohol, it should not be used in newborns or in people who are sensitive to benzyl alcohol

The benzyl alcohol preservative in bacteriostatic water has been linked to serious adverse effects including "gasping syndrome," metabolic acidosis, and neurological complications in this age group

Less common B12 shot side effects include : Chest tightness Skin rash or hives Dizziness Difficulty breathing A blue tint to the skin Call your doc ASAP if you notice any of these negative effects

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