ACETYLCYSTEINE SOLUTION, USP, 20% (200 mg/mL), packaged in a) 4 mL Vial NOT FOR INJECTION (NDC 0517-7604-01), and b) 25x4 mL Vials NOT FOR INJECTION (NDC 0517-7604-25), Rx only, AMERICAN REGENT, INC., SHIRLEY, NY 11967.