Bronchodilators aβ Receptor agonists D Non-selective: adrenaline, isoprenaline 囗β- selective: salbutamol, terbutaline, salmeterol formoterol D Theophyllines: aminophylline o Muscarinic antagonists: ipratropium bromideBronchodilators  Receptor agonists Non-selective：adrenaline, isoprenaline 2-selective: salbutamol, terbutaline, salmeterol, formoterol Theophyllines: aminophylline Muscarinic antagonists: ipratropium bromide