b12 injection gave me fever what does it mean Doctor Reveals Facts About Injections B12 shots for weight loss:

If you do not get enough vitamin B12, this can affect your ability to make new and healthy cells and you may experience a low red blood cell count, which is known as anaemia

Infect Genet Evol 11: 512517

As with any vaccine, there is a small chance of severe allergic reaction to it

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Especially smokers should thus avoid cyanocobalamin and use other forms of B12 instead this will keep their exposure to cyanide down, and will even help with detoxification

Anemia ICD-10 to CPT and HCPCS Code Pairing: The Complete 2026 Reference The ICD-10 code submitted on an anemia claim must support the medical necessity of every CPT and HCPCS code billed alongside it