Glucocorticoid inhalation can be used in patients with varying degrees of asthma as well as in patients with chronic obstructive pulmonary disease, but it should be carried out in strict accordance with medical advice. The duration of glucocorticoid inhalation therapy is relatively long, and commonly used glucocorticoid drugs include beclomethasone propionate and fluticasone. Contraindications are hypersensitivity to glucocorticoids, active peptic ulcer, etc. Adverse effects are bacterial infections and slow wound healing with prolonged use. Mild to moderate chronic asthma can be stabilized after 2 to 3 months, severe asthma can be stabilized after 3 to 6 months, and then gradually reduce the dosage. During the tapering process, proceed according to the appropriate tests to feel out the lowest dose that can control the symptoms. Never stop or reduce the dose on your own to avoid serious adverse effects. There are many dosage forms and types of glucocorticoid inhalation, and it is important to follow the physician’s instructions for proper inhalation therapy to achieve the best therapeutic effect.