Cyanocobalamin injection USP, 1,000 mcg/mL, For IM or SC Use Only, packaged in a) 1 mL Multi-Dose Vial (NDC 0517-0031-01), and b) 25x1 mL Multi-Dose Vials (NDC 0517-0031-25) Rx only, AMERICAN REGENT, INC., SHIRLEY, NY 11967.