IRCT2015111015446N8 IRCT 2015-11-27 Vice chanceller for research,Ahvaz Jundishapur University of Medical Sciences Comparison of clinical and Spirometric response between nebulized salbutamol _ magnesium sulfate and nebulized salbutamol alone in acute asthma attack Comparison of clinical and Spirometric response between nebulized salbutamol _ magnesium sulfate and nebulized salbutamol alone in acute asthma attack 2014-03-22 anticipated 146 Complete https://irct.ir/trial/14712 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment. 3 Acute attack asthma. Intervention 1: The intervention group were recorded at 0, 20, 40, 60 spirometric values of FEV1 and PEFR were measured and recorded. For each patient to record the values of FEV1 and PEFR, 3 times a spirometry performed and is considered the highest number. Immediately after spirometry, nebulize salbutamol dose (2.5 mg), as well as magnesium sulfate 20 g / 100CC) 1.5 CC) done. Intervention 2: The control group were recorded at 0, 20, 40, 60 spirometric values of FEV1 and PEFR were measured and recorded. For each patient to record the values of FEV1 and PEFR, 3 times a spirometry performed and is considered the highest number. Immediately after spirometry, nebulize salbutamol 2 / 5CC (2.5 mg), with 1.5 CC of saline in the control group will receive.