Budesonide has strong anti-inflammatory, anti-allergic and asthmatic effects, and can be used for the treatment of various allergic diseases, as well as for the treatment of wheezing bronchitis and asthma. Budesonide belongs to a kind of glucocorticoid, and the commonly used clinical dosage forms include powder spray, nasal spray and aerosol, etc. Among them, the nasal spray is mainly used for the treatment of bronchitis and asthma. Nasal sprays are mainly used for the treatment of seasonal and perennial allergic rhinitis, but also for the treatment of perennial non-allergic rhinitis. Aerosols and inhalers are mainly used for the prevention and treatment of bronchial asthma and improvement of symptoms in patients with wheezing bronchitis and chronic obstructive pulmonary emphysema. The most frequent adverse effects of budesonide during its use are hoarseness, sore throat, dysphagia, and induction of candida infections. There are many indications for the use of the drug, and the exact method of use and dosage should be prescribed by the doctor.