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The Anatomical Therapeutic Chemical (ATC) classification system



Level 5

  • R - Respiratory system
  • R03 - Drugs for obstructive airway diseases
  • R03D - Other systemic drugs for obstructive airway diseases
  • R03DB - Xanthines and adrenergics
  • R03DB04 - Theophylline and adrenergics

  • Theophylline and adrenergics






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