Budesonide and terbutaline do not work the same way, and although both drugs can be used to treat bronchial asthma, they belong to different classes of drugs in pharmacological classification and have different mechanisms of action. Budesonide is a glucocorticoid that inhibits the inflammatory response of the respiratory tract, reduces bronchial hyperreactivity, and relieves bronchospasm, so the therapeutic effect of budesonide on bronchial asthma is mainly attributed to the fight against allergic or non-allergic inflammatory reactions. Terbutaline is a bronchodilator that dilates the bronchial tubes by causing the smooth muscles of the bronchial tubes to dilate; therefore, the therapeutic effect of terbutaline on bronchial asthma is attributed to the direct dilation of the bronchial tubes.