Vitamin Injection (IM Shot) Dr. Revive IV Therapy & Pain Clinic. 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 B 12 (Methylcobalamin) Therapy MedClub by Dr Jenn B12 vitamin Store How to Give an Intramuscular Injection of Vitamin B12 B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics