REZENOPY (naloxone HCl) nasal spray 10 mg delivers the highest FDA-approved concentration of naloxone nasal spray available on the U.S. market — 10 mg per spray at a concentration of 10 mg/0.11 mL.1 It is a pre-filled, single-dose intranasal spray dispensed as a two-pack (NDC: 83245-003-01), manufactured in the U.S.A. by Scienture, LLC. See the 10 mg difference at www.REZENOPY.com.