how often should you inject vitamin b12 Dosages: Your GoodRx Guide how often should you inject

If you experience any severe or unusual symptoms after the injection, contact your healthcare provider or seek emergency medical assistance immediately

Making an informed decision can help you achieve effective and safe results

Image: Dragana Gordic/Getty Images About the Authors Toni Golen, MD, Editor in Chief, Harvard Women's Health Watch

Vitamin B12 supplements can also be used if necessary

The best B12 injection schedule depends on your health needs and how you react to the treatment

Notably, no significant increases in plasma or urine levels of NAD+ or its metabolites were observed within the first 2 hours of infusion, indicating rapid and complete tissue uptake and/or metabolism (at least for the first 2 hours) (10)