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While the effects of a vitamin B12 injected will become noticeable around 24 hours after administration, they will start to take effect almost immediately and will stay in your system for around 1 week, but may vary depending on the metabolic rate of the patient
The healthcare provider should use only the amount of bacteriostatic water needed to achieve the desired concentration for injection, following the drug manufacturers directions
Needle length and gauge
Visible Cloudiness or Separation Cause: Incomplete mixing, ingredient incompatibility, or early signs of degradation
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