Classification of drugs acting on respiratory system I. Antitussive drugs Centrally acting Codeine Peripherally acting: Benzonatate II. Expectorant, drugs iputum-diluting g drugs:NH4c、Kr Mucolytic drugs: Ambroxol Ill. Antiasthmatic drugs Bronchial dilators B receptor agonists: Salbuterol heophyllines: Aminophylline muscarinic antagonists: Ipratropine 2. Anti-inflammatory drugs lucocorticosteroids: Budesonide editor release inhibitors Disodium cromoglycateⅠ. Antitussive drugs: 1. Centrally acting: Codeine 2. Peripherally acting: Benzonatate Ⅱ. Expectorant drugs: 1. Sputum-diluting drugs: NH4Cl、KI 2. Mucolytic drugs: Ambroxol Ⅲ. Antiasthmatic drugs: 1. Bronchial dilators (1) receptor agonists: Salbuterol (2)theophyllines: Aminophylline (3)muscarinic antagonists: Ipratropine 2. Anti-inflammatory drugs (1)glucocorticosteroids: Budesonide (2)mediator release inhibitors: Disodium cromoglycate Classification of drugs acting on respiratory system