Hypothesis is that there is no difference between Croup's Scorings and discharge's times of patients who will get "Nebulized Epinephrine+ Dexamethason" compare with whom they will get only ordinary care including "Cool Nebulized normal saline+ Dexamethason" . We will divide patients into two groups randomly, intervention and control. First we will measure all of patients for Croup Scoring, Blood pressure, Heart rate and Respiratory rate before treatment. Intervention Group: This patients will be treated by Epinephrine (0.5 mg / kg, max dose: 5 mg) nebulized + Dexamethasone( 0.6 mg / kg, max dose: 8 mg) and we will measure again Croup scoring ( Westley Score), Blood pressure, Heart rate and Respiratory rate on the minutes time of 30, 60, 90 and 120. Control group: This patients will get only Dexamethasone (0.6 mg / kg, max dose: 8 mg) + Cool nebulized normal saline. We will measure again Croup Scoring, Blood pressure, Heart rate and Respiratory rate on the minutes of 30, 60, 90 and 120 as well.