How to Give a B12 Injection: Step By Step Instructions Subcutanous injection self administration South Tees Hospitals NHS Foundation Trust Subcutaneous (SC) and Intramuscular (IM) Injections Must Knows for Subcutaneous administration: Pinch skin with non dominant hand and hold syringe with dominant hand Always inject: 2 inches away from umbilicus (for abdomen) 3 inches How SubQ Injections Like B12 and NAD+ Fit Your Routine Olympia Pharmaceuticals Instruction Guide for Intramuscular (IM) Self injection of B12 Methylcobalamin 1mg 5mg