Common drugs that diastole bronchial smooth muscle include β2 agonists, M receptor blockers, theophyllines, leukotriene receptor antagonists, and glucocorticoid drugs. 1. β2 agonist: it can excite the β2 receptor of bronchial mucosa, which can cause bronchial smooth muscle relaxation and improve airway spasm, such as salbutamol and salmeterol. 2. M receptor blockers: these drugs usually also can make the smooth muscle get diastolic, such as ipratropium bromide, tiotropium bromide. 3. Theophylline drugs: such as aminophylline, doxophylline, etc. Theophylline drugs are easy to lead to adverse reactions if the dosage is too large, so it is necessary to pay attention to the rational use of these drugs. 4. Leukotriene receptor antagonists: such as montelukast sodium, the drug through the role of anti-inflammatory, can to a certain extent diastolic bronchial smooth muscle, generally only for asthma caused by smooth muscle spasm has a certain effect. 5. Glucocorticoid drugs: such as methylprednisolone, prednisone and other glucocorticoid drugs, can also play a role in antispasmodic and asthma, asthma diastolic smooth muscle effect.