The frequency of nebulizer inhalation clinically depends on the patient’s condition and the severity of the condition, and also has a relationship with the selected medication. For the acute attack of bronchial asthma, because of its rapid attack, so you can do nebulized inhalation, nebulized once every half hour, after the symptoms are relieved can be nebulized once every 4 hours or nebulized 2-3 times a day, with good anti-inflammatory, asthma, diastolic bronchial effect. In addition, for acute epiglottitis and other life-threatening diseases, high-dose glucocorticoid nebulizer inhalation can be done once every half hour for 2-3 times. For nebulized drugs containing β2 agonists, because of their rapid action, their maintenance time is 4-6 hours, so frequent nebulized inhalation within 2 hours may cause adverse reactions in patients, such as skeletal muscle tremors and heartburn.