Levosalbutamol Hydrochloride Nebulized Inhalation Solution has a bronchodilating effect and is used to treat or prevent bronchospasm in adults and adolescents over the age of 12 years due to reversible obstructive airway disease. Levosalbutamol Hydrochloride, compared with normal salbutamol, removes the dextrose, which is more selective for β1 receptors and brings side effects, and retains only levosalbutamol, which is more selective for β2 receptors. It is characterized by fewer side effects, better efficacy, and smaller dosage. Adverse effects of the drug include arrhythmia, shortness of breath, chest pain, nausea, nervousness, tremor, abnormal electrocardiograms, and hypertension. Tachyphylactic hypersensitivity reactions may occur after the use of levosalbutamol hydrochloride nebulized inhalation solution, which are manifested by angioneurotic edema, urticaria, rash, bronchospasm, oropharyngeal edema. This product is contraindicated in persons with a history of hypersensitivity to the drug. Levosalbutamol Hydrochloride Nebulized Inhalation Solution is not a substitute for anti-inflammatory medications, and certain patients may not be able to effectively control their symptoms by using this medication alone. People suffering from bronchospasm should visit a regular hospital and use the drug under the guidance of a medical professional to avoid taking the drug on their own, which may lead to poor control of the condition.