What is Vitamin B12 injection?

The short answer

In the US, you need a prescription to get Vitamin B12 injection (cyanocobalamin / hydroxocobalamin).

3 sources
Status as of October 4, 2026
How we source
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By Ellum EditorialUpdated October 4, 2026AI use

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What it is

Type: Vitamin (cobalamin) (not a peptide)
Also known as: b12 injection, b12 shot, cyanocobalamin, cyanocobalamin injection, hydroxocobalamin, nascobal
How it works: Replaces vitamin B12 for blood and nerve function.

Regulatory status

FDA-approved (Rx) How we label status

As of October 4, 2026, Vitamin B12 injection (cyanocobalamin / hydroxocobalamin) is an FDA-approved prescription drug for B12 deficiency, pernicious anemia.

See Vitamin B12 injection (cyanocobalamin / hydroxocobalamin) in the Index →

Federal (FDA): Approved Rx (cyanocobalamin injection ANDA080737 and others; hydroxocobalamin ANDA085998; Cyanokit NDA022041); label: B12 deficiency, pernicious anemia
503A compounding: Approved-drug component (not in any 503A category) (as of May 14, 2026)
WADA 2026: Not named

References

Sources as of October 4, 2026