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Anatomical Therapeutic Chemical (ATC) classification [BR:br08303]
  R RESPIRATORY SYSTEM
    R01 NASAL PREPARATIONS
      R01A DECONGESTANTS AND OTHER NASAL PREPARATIONS FOR TOPICAL USE
        R01AA Sympathomimetics, plain
          R01AA06 Tetryzoline [DG:DG01030]
            D01023  Tetrahydrozoline hydrochloride (JAN/USP)
        R01AB Sympathomimetics, combinations excl. corticosteroids
          R01AB03 Tetryzoline [DG:DG01030]
            D01023  Tetrahydrozoline hydrochloride (JAN/USP)
  S SENSORY ORGANS
    S01 OPHTHALMOLOGICALS
      S01G DECONGESTANTS AND ANTIALLERGICS
        S01GA Sympathomimetics used as decongestants
          S01GA02 Tetryzoline [DG:DG01030]
            D01023  Tetrahydrozoline hydrochloride (JAN/USP)

USP drug classification [BR:br08302]
  Respiratory Tract/Pulmonary Agents
    Cold-Cough
      Tetrahydrozoline [DG:DG01030]
        D01023  Tetrahydrozoline hydrochloride (JAN/USP)

Classification of Japanese OTC drugs [BR:br08313]
  Agents for ophthalmologic use
    62 General eye drops
      D01023  Tetrahydrozoline hydrochloride (JAN/USP)
  Agents for otolaryngologic use
    70 Nasal sprays for inflammation
      D01023  Tetrahydrozoline hydrochloride (JAN/USP)

Risk category of Japanese OTC drugs [BR:br08312]
  Second-class OTC drugs
    Inorganic and organic chemicals
      Tetryzoline
        D01023  Tetrahydrozoline hydrochloride (JAN/USP)

Drug groups [BR:br08330]
  Cardiovascular agent
    DG01456  Adrenergic receptor agonist
      DG01450  alpha-Adrenergic receptor agonist
        DG01448  alpha1-Adrenergic receptor agonist
          DG01030  Tetryzoline
            D01023  Tetrahydrozoline hydrochloride

Target-based classification of drugs [BR:br08310]
  G Protein-coupled receptors
    Rhodopsin family
      Adrenaline
        ADRA1 [HSA:148 147 146] [KO:K04135 K04136 K04137]
          D01023  Tetrahydrozoline hydrochloride (JAN/USP)