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Anatomical Therapeutic Chemical (ATC) classification [BR:br08303]
  N NERVOUS SYSTEM
    N02 ANALGESICS
      N02A OPIOIDS
        N02AA Natural opium alkaloids
          N02AA11 Oxymorphone [DG:DG01343]
            D00844  Oxymorphone hydrochloride (USP) <US>

USP drug classification [BR:br08302]
  Analgesics
    Opioid Analgesics, Long-acting
      Oxymorphone [DG:DG01343]
        D00844  Oxymorphone hydrochloride (USP)
    Opioid Analgesics, Short-acting
      Oxymorphone [DG:DG01343]
        D00844  Oxymorphone hydrochloride (USP)

Drug groups [BR:br08330]
  Neuropsychiatric agent
    DG01564  Opioid receptor agonist
      DG01563  mu-Opioid receptor agonist
        DG01343  Oxymorphone
          D00844  Oxymorphone hydrochloride
  Analgesic
    DG01984  Opioid analgesics
      DG01343  Oxymorphone
        D00844  Oxymorphone hydrochloride

Target-based classification of drugs [BR:br08310]
  G Protein-coupled receptors
    Rhodopsin family
      Opioid
        OPRM1 [HSA:4988] [KO:K04215]
          D00844  Oxymorphone hydrochloride (USP) <US>