Salbutamol and terbutaline are short-acting bronchodilators, belonging to a large class of drugs, currently used in nebulized inhalation therapy, can rapidly expand the bronchial smooth muscle, mainly in the time of action, dosage, contraindications, adverse reactions and other aspects of the difference. 1. Time of action: Salbutamol is mainly administered by inhalation, with rapid onset of action after inhalation and short maintenance time. Inhalation 5~10 min after the onset of action, the strongest effect time in 1~1.5h, the effect of maintenance time for 3~4h. Terbutaline is mainly administered by inhalation, with rapid onset of action after inhalation and relatively long duration of action. After inhalation, it takes effect in 5~15min, the strongest time of action is about 1h, and the duration of action is 4~6h. 2. Indications: Salbutamol is used in various types of bronchial asthma and various bronchial and pulmonary disorders accompanied by bronchospasm; it can also be used to prevent and control preterm labor and relieve placental vasospasm; it can also be used in sinus bradycardia, sinus arrest and other chronic arrhythmias. Terbutaline main indications for bronchial asthma, asthma-like bronchitis and chronic obstructive pulmonary disease when the bronchospasm. 3. Contraindications: Terbutaline is mainly contraindicated for those who are allergic to Terbutaline. Contraindications for salbutamol are those who are allergic to salbutamol. 4. Adverse reactions: common adverse reactions of salbutamol include tremor, nausea, palpitations (rapid heartbeat, often accompanied by panic), headache, etc.; common adverse reactions of terbutaline include dry mouth, nasal congestion, mild chest tightness, drowsiness, etc.. The choice and use of drugs need to be under the guidance of a professional physician, do not use drugs without authorization to avoid adverse consequences.