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The Anatomical Therapeutic Chemical (ATC) classification system



Level 2

  • R - Respiratory system
  • R03 - Drugs for obstructive airway diseases

  • R03A - Adrenergics, inhalants
  • R03B - Other drugs for obstructive airway diseases, inhalants
  • R03C - Adrenergics for systemic use
  • R03D - Other systemic drugs for obstructive airway diseases






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