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 B12 Lipotropic Injections Vitamin B 12 Injectable Solution B12 vitamin Store B12 injection 1000mcg 20ml vial 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 Neurobion B12 Forte 10 Vials, 10 ml Liquid Vitamin Complex for Deficiencies, Metabolism, Immune Support Walmart.com