Cyanocobalamin (B12) Products American Regent 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 Compounded Cyanocobalamin (Vitamin B12) Injection Empower Vitamin B 12 Injections for Energy & Wellness Midwest Express Clinic Cyanocobalamin: Package Insert Prescribing Information Methylcobalamin is ready use form of B12. Key Benefits and Uses Neurological Support: Methylcobalamin helps maintain nerve function by producing myelin, a protective sheath around nerves. Deficiency Treatment: It is