B 12 Compliance Injection: Package Insert Prescribing Info How Long Does a B12 Injection Last? UK Treatment Guide Bolt Pharmacy Vitamin B12 1000mcg Injection Rx PBS Animal Health Cyanocobalamin (B12) Products American Regent Cyanocobalamin Vitamin B12 for Injection 1000 mcg ml 100 ml Bottle. 1Family 1Health Pharmacy Vitamin B12 injections now available! Have you been feeling lethargic? Mental fog? Struggling to engage? Following a plant based diet? You may be low in vitamin B12. The injection can also be