Compounded Vitamin B Complex Injection Empower Pharmacy How to Give a B12 Injection: Step By Step Instructions How to Give Yourself Intramuscular (IM) Injections Patients & Families UW Health MIC + B12 Injection Methionine 20 mg mL Inositol 50 mg mL Choline 50 mg mL + Methylcobalamin (B12) 30 mL Preservative Free Vial Premium Health Care Pharmacy 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 How to Self Inject Vitamin B12 at Home The Sanctuary Wellness Institute