The treatment of bronchial asthma is mainly inhaled medication, which is divided into two categories: 1. inhaled surface hormones; 2. drugs to relieve airway spasm: long-acting β2 agonists plus surface hormones are better drugs to control asthma. During acute attacks, the use of β2 agonists or M receptor antagonists such as salbutamol aerosol can be relieved in 5-10 minutes, but the use of more of this drug will lead to an accelerated heart rate, and long-term use will cause arrhythmia and affect heart function, so it should not be used for a long time.