Budesonide formoterol powder inhaler is effective in treating some asthma patients and patients with chronic obstructive pulmonary disease (COPD), and its effectiveness varies from person to person. Budesonide formoterol powder inhaler is a combination of budesonide (glucocorticoid) and formoterol fumarate (selective β2-adrenergic receptor agonist), which has anti-inflammatory and bronchial smooth muscle diastolic effects. The drug is suitable for the routine treatment of asthma patients requiring the combined application of inhaled corticosteroids and long-acting β2-agonists, and can also be used in patients with chronic obstructive pulmonary disease, effectively relieving symptoms such as wheezing, shortness of breath and cough. For patients who meet the indications for the drug, the drug has a certain therapeutic effect, but in view of the individual variability of the drug users, resulting in different effects of the drug, the specific should be different from person to person. Note that contraindications include hypersensitivity to budesonide, formoterol or inhaled lactose. The most common adverse reactions to the drug are tremor and palpitations, which usually diminish or disappear within a few days of treatment. Specific medication should be administered under the supervision of a specialist.