Do Vitamin B12 Shots Need To Be Refrigerated? Invigor Medical Vitamin B12 Injections: Hot Shots? Full Guide PA Relief Safe to use if expired? : r B12_Deficiency Hi I bought the B12 injectable liquid but there's no use by date on it or how long you have to use it once it's opened. Anyone know the answer? TIA x Compounded Cyanocobalamin (Vitamin B12) Injection Empower Do B12 Injections Need to Be Refrigerated: 6 Cool Solutions