Compounded Vitamin B Complex Injection Empower Pharmacy Practice Nurse Professional Resources for General Practice Nursing How to Self Inject Vitamin B12 at Home The Sanctuary Wellness Institute What Happens If You Inject B12 Wrong: 6 Red Flags Subcutaneous Injection: What It Is and How to Give One 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