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 B12 Injection DRIP AND DIP VITA JEC Vitamin B12 for Dogs, Cats & Horses, 1000 mcg mL, 100 mL Easy Refills Chewy Rx B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Biovit 12 Depot Intramascular Injection ( Vitamin B 12 Hydroxocobalamin 1000 g + Folic acid 1000 g + Vitamin B 6 20 mg ) 2 ampoules How to Self Inject Vitamin B12 at Home The Sanctuary Wellness Institute