The common practice of tapering the dose of oral corticosteroid after recovery from an exacerbation is complex for the patient and may be unnecessary. Several studies have compared abrupt cessation of corticosteroid after 7-10 days' therapy with a tapering dose. 9 There was no difference in lung function or relapse rate between the steroid tapering group and the abrupt cessation group. Tapering is not necessary provided that the patient is not using oral corticosteroids chronically, and is protected by high-dose inhaled corticosteroid after the oral steroid is stopped. It takes an average of 7-10 days for symptoms and lung function to stabilise after an asthma exacerbation. 7 , 9 Because of this, immediately tapering the corticosteroid could actually lead to rebound asthma. Although biochemical evidence of partial hypothalamic-pituitary axis suppression can be detected after short courses of oral corticosteroid, this is rarely of clinical significance unless the patient has been taking steroids long term.