B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Get a vitamin B12 injection for only $15. Buy 2 for $10 each and we will save one for your next visit. Walk ins welcome 7 days a week with convenient locations Treatment with high dose vitamin B12 been shown to be safe CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL HYDROXOCOBALAMIN INJ, USP, 1000MCG ML, MDV, 30ML NDC 00591288830 NON RETURNABLE Merit Pharmaceutical