- A subject must have been using a high dose of inhaled glucocorticosteroid (ICS) either alone or in combination with a long-acting beta2 agonist (LABA) for at least 12 weeks prior to Screening, with no use of oral glucocorticosteroids within 30 days prior to Screening. A subject must have been on a stable asthma regimen (daily dose unchanged) for at least 2 weeks prior to Screening. High daily doses of ICS are defined as follows: