Synonyms : Bristol-Myers Squibb Brand of Oxymorphone Hydrochloride, Endo Brand of Oxymorphone Hydrochloride, MRZ 2593-Br, MRZ-2593, Methylnaloxone, N-Methylnaloxone, N-Methylnaloxone Bromide, Naloxone MB, Naloxone Methobromide, Naloxone Methylbromide, Numorphan, MRZ 2593