Hydroxocobalamin (Vitamin B12): Uses, Alternatives, Side Effects & More GoodRx How Does a Cyanocobalamin Injection Compare to Semaglutide? CYANOCOBALAMIN INJECTION, USP 10,000mcg 10mL (1,000mcg mL) 10mL VIAL Cyanocobalamin injection (Vitamin B12) how to use: Uses, Dosage, Side Effects, Contraindications NEW TREATMENT ALERT A vitamin B12 injection helps treat or prevent deficiency by delivering the vitamin directly into the bloodstream. It's often used for people with absorption issues and is usually safe