Vitamin B12 Injection Single Dose Vial Vitamin B12 Injectable City Cat Pharmacy is available for clients of City Cat Vet Clinic only. Cyanocobalamin (Vitamin B12) Injection 1000 mcg mL, Multiple Dose Vial 1 mL, 25 Tray Vitamin B 12 Cyanocobalamin Injection 1000MCG mL 30 mL MDV Med Plus Physician Supplies Giving vitamin B12 parenterally? Which electrolyte should you check first? Answer: Potassium. And why does it matter? Because rapid correction of severe B12 deficiency can trigger a surge in Vitamin B12 Injection We Come to You ASAP IVs IV Hydration Experts of San Diego, Phoenix, Scottsdale, San Francisco