Dr. prescribed B12 injections. Pharmacy only gave me vials. Where do you get your needles and syringes? What size?? Where do I inject? : r B12_Deficiency Neurobion Extra Forte B12 10,000 mcg Vials Extreme Powerful B12 10 Vials per Box 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 Vitamin B 12 Injectable Solution