How to Give B12 Injections at Home to Yourself PA Relief A Guide to the Best Needles for B12 Injections Precision Labs Luer Lock Syringes 3 mL without Needle 5 16 inch, 0.3 mL Ultra Fine, 1 Mountainside Medical 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 18.5 Administering Subcutaneous Medications Nursing Skills