Vitamin B12 shots: Uses, benefits, and side effects How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust 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 B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics