|
|
|
|
The Anatomical Therapeutic Chemical (ATC) classification system
|
|
|
|
|
|
Level 5
R - Respiratory systemR03 - Drugs for obstructive airway diseasesR03D - Other systemic drugs for obstructive airway diseasesR03DB - Xanthines and adrenergicsR03DB04 - Theophylline and adrenergics
Theophylline and adrenergics
|
|
|
|