B12 Shots & B12 Injections: The Good, Bad and Alternative! Vitamin B12 Injection at BiosenseClinic.com a Licensed Pharmacy B12 Injection Dose: 7 Key Guidelines for Adults and Common Prescriptions Liv Hospital Cyanocobalamin vs Hydroxocobalamin (Vitamin B12 forms) Key Clinical Differences Hydroxocobalamin is preferred in: Pernicious anemia Severe vitamin B12 deficiency Neurological symptoms (subacute combined degeneration, neuropathy) Cyanocobalamin is Optimal Vitamin B12 Dosage and Treating Deficiency Vitamin B12 Injection treat harmful anemia plus B 12 insufficiency