Not all shots are the same here's a guide Injections are a fast, effective way to deliver medications, nutrients, and vaccines directly into the bodybut not all injections are the Vitamin B12 for Injection Cyanocobalamin 1,000 mcg, 25 Box (Rx) Mountainside Medical Dr. prescribed B12 injections. Pharmacy only gave me vials. Where do you get your needles and syringes? What size?? Where do I inject? : r B12_Deficiency Different Types Of Needles: Know About The Gauge, Length & Sizes B12 Injection sites + How to use B12 Shots Safely