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 Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief B12 Injection sites + How to use B12 Shots Safely Best Vitamin B12 Injection Sites? ThinWorks Vitamin C and B12 Injection Techniques Subcutanous injection self administration South Tees Hospitals NHS Foundation Trust