triple b12 injection Cyanocobalamin (B12) 1000 mcg/mL, Multiple Dose Vial 30 mL How Its Sold 100 mL or 250 mi vial Special Precautions Keep away from children and animals Compounded Cyanocobalamin (Vitamin B12) Injection

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Last reviewed: May 12, 2026 Last updated: May 12, 2026 Written by: Jay Hastings , CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations

Both NAD and B12 injections are administered as shots, so there may be a mild level of discomfort

While medication one day past the BUD may still be effective, you have no way to verify this without laboratory testing

If you notice signs of anaphylaxisswelling of your tongue, face, or throat, difficulty breathing, or difficulty swallowingafter getting a B12 injection, call 911 or head to the closest emergency room immediately