Background: Asthma is a chronic airway disease that causes difficulty in breathing in which bronchospasm is a hallmark in acute exacerbation. In management of asthma attack, agonist β2 is the best option as treatment for mild, moderate and severe asthma. Agonist β2 nebulization as bronchodilator has been used wide/y nowadays. Lack of clinical study have been done to compare the pharmacologica…