Vitamin B12 Injection Hydroxocobalamin 1mg 1ml ( 5 vials) Skin on You Lets do my first B12 injection together This is something Ive been nervous about for a long time, but today I finally did itand it honestly wasnt bad at all. I used the Union Medico needle guide How to Give B12 Injections at Home to Yourself PA Relief B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics