Is It Okay To Use A B12 Injection With Insulin Syringes? 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 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Sites of Administration of Subcutaneous injection B12 Shot: Step by Step Guide for Self Injection TikTok How to Give B12 Injections at Home to Yourself PA Relief