You searched for methylnaltrexone Did you mean? Arx-naltrexone Methotrexate Naltrexone Methylprednisolone Methoxyflurane Methyldopa Methylphenidate Methadone Methoblastin Methoxsalen 1 results METHYLNALTREXONEBody system: Alimentary Tract And Metabolism Injection methylnaltrexone bromide 12 mg/0.6 mL injection, 0.6 mL vial methylnaltrexone bromide 12 mg/0.6 mL injection, 7 x 0.6 mL vials