Cyanocobalamin 1,000 mcg mL Injection 1 mL McKesson CYANOCOBALAMIN INJECTION, USP 10,000mcg 10mL (1,000mcg mL) 10mL VIAL Vitamin B12 Injection treat harmful anemia plus B 12 insufficiency Vitamin B 12 Injectable for Horses, Dogs and Cats 1000 mcg 250 ml Are you feeling run down? Low Energy? A quick Vitamin B12 injection can help support energy, metabolism, and overall wellness. It delivers the vitamin directly into the muscle, allowing your body to