There are several types of drugs for the treatment of asthma: 1. Relieving drugs: drugs that relieve asthma symptoms by rapidly relieving bronchial smooth muscle spasm should be used on an as-needed basis. The drugs of choice for acute attacks are short-acting β2 agonists, in addition to salbutamol, terbutaline, anticholinergics, glucocorticoids, etc.; 2. Controlled drugs: mainly used to treat chronic inflammation of the airways and bring asthma under clinical control, and are drugs for long-term use. They include budesonide, long-acting β2 agonists, leukotriene modulators, and slow-release theophylline, among which long-acting β2 agonists cannot be used alone and can be mixed with inhaled glucocorticoids.