This is a double blind, randomized clinical trial in shariati and sina hospitals. All patients in both group would receive the standard treatment of asthma (o2,beta 2 agonist inhaler, anti cholinergic inhaler and systemic corticosteroids,100mg hydrocortison) then patients will randomly divided into 2 groups.
in the first group, nebulized budezonide (pulmicort) will be administered with the dose of 0.5 mg every half an hour up to 3 doses and in the second group nebulized normal saline (placebo) will be administered with the dose of 3 cc in every half an hour up to 3 doses then we will compare and evaluate the patients vital signs(PR,RR,O2saturation), VBG, lung physical examination, any evidence of respiratory distress, the time of patients response to treatment, their wheezing relief, patients satisfaction and physical satisfaction. We will compare all these variables during 30, 60,180 min after treatment. We also want to determine patients disposition, length of hospital stay, recurrence rate and readmission rate in one month later.