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 Compounded Cyanocobalamin (Vitamin B12) Injection Empower CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief B 12 (Methylcobalamin) Therapy MedClub by Dr Jenn Ivy Grove Surgery : Self administration of B12 injection