Corticosteroids are the first-line therapy for managing acute asthma exacerbations. Studies have shown that systemic steroids effect decrease relapse and hospital admission. Due to its short half-life, Prednisone is usually given daily or twice daily for 3-5 days. It has been associated with poor compliance due it the prolonged course. Dexamethasone half-life is 36 - 72 hours.