Veterinary Injection Cyanocobalamin Injection, Vitamin B12 Injection Vitamin B12 Injection and Butafosfan Vitamin B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Rx Item Cyanocobalamin 1000mcg 1X30 ML Multi Dose Vial by Hikma Pharma Medinaz Vitamin B12 Deficiency Vitamin B12 deficiency happens when the body does not have enough vitamin B12. Vitamin B12 is important for making healthy red blood cells and