Still taking vitamin B12 injections? Move over shot. A pill may be just as good. Dr. Leslie Greenberg's Blog Vitamin B 12 Cyanocobalamin 1,000 mcg mL Intramuscular or Subcutaneous Injection Multiple Dose Vial 30 mL Vitamin B 12 Cyanocobalamin Injection 1000MCG mL 30 mL MDV Med Plus Physician Supplies Methylcobalamin Injections B12 10,000mcg 30,000mcg Vial CYANOCOBALAMIN INJECTION, USP 10,000mcg 10mL (1,000mcg mL) 10mL VIAL Where to Inject Vitamin B12