Abstract
Over the past 10 years there have been striking improvements in the treatment of asthma, largely as a result of the earlier and more widespread use of inhaled corticosteroids. The development of new treatments for asthma has proved difficult, although several immunologic approaches are undergoing preclinical and clinical assessment.1 Antileukotrienes are the only new class of drugs to treat asthma that have been introduced in the past 25 years, but their efficacy is somewhat limited and unpredictable, as compared with that of inhaled corticosteroids.Mild asthma can be controlled in most patients by relatively low doses of inhaled corticosteroids, and . . .