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 Site: Administering B12 Shots Intramuscular Injection: Definition and Patient Education How to Give a B12 Injection: Step By Step Instructions How To Give A Subcutaneous Injection And Sites The HCG Institute How to self administer subcutaneous B12 injection., 1. Withdraw proper dosage from vial into an insulin syringe, 2. Clean site of injection (abdomen or other proper site), 3. Pinch the skin where you