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 Vitamin B12 Monthly Injection Dose: Typical Dosages & Administration Methods Liv Hospital Cyanocobalamin (B12) Products American Regent CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL Vitamin B12 Injection Dosage for Adults: 7 Key Facts & Guidelines Liv Hospital