Bronchodilators aβ Receptor agonists D Non-selective: adrenaline, isoprenaline 口β2- selective: D moderate-acting: salbutamol, terbutaline D long-acting: salmeterol, formoterol D Theophylines: aminophylline 0 Muscarinic antagonists: ipratropium bromideBronchodilators  Receptor agonists Non-selective：adrenaline, isoprenaline 2-selective: moderate-acting: salbutamol, terbutaline long-acting: salmeterol, formoterol Theophyllines: aminophylline Muscarinic antagonists: ipratropium bromide