- Had asthma, which required any of the following within the past 30 days: 1) admission to the hospital, 2) emergency room visit, or 3) a change in dosing regimen. Subjects were allowed to continue theophylline, long acting β2 agonists, inhaled cromoglycate no more than 6.4 mg/day, or nedocrimil no more than 14 mg/day. Subjects were allowed to continue inhaled corticosteroids in doses not exceeding those listed in Appendix B of the study protocol, as long as the dose did not change during the study. Subjects were allowed the use of short acting β2 agonists on an as needed (PRN) basis.