Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief B12 Injection sites + How to use B12 Shots Safely B12 vitamin Store How to Give an Intramuscular Injection of Vitamin B12 Needle Injection Techniques Every Nurse Should Know! Whether you're prepping for your NCLEX or brushing up on your skills, here's a quick breakdown of the most common injection routes you'll encounter Intramuscular injection: Locations and administration