- Using one of the following asthma therapies prior to entry into the study: SABA inhaler alone (e.g. salbutamol) on an as required basis and/or Regular non-inhaled corticosteroid (ICS) controller medications for asthma (e.g. cromones or leukotriene receptor antagonists) and/or Previously treated with ICS (equipotent to inhaled budesonide <=400 micrograms (mcg) total daily dose). There must be no ICS use within 2 weeks of Visit 1 (Screening).