Airway Responses to Montelukast and Desloratadine.
Airway Responses to Montelukast and Desloratadine.
Montelukast (for asthma) and desloratadine (for allergies) are effective therapy for their
 current uses. Part of what happens when your allergies trigger your asthma should be
 prevented by either of these drugs. This project is being conducted to determine if these
 drugs are effective, either alone or in combination, on controlling asthma that is triggered
 by allergies.
Inclusion Criteria:

 -  baseline FEV1 > or = 65% predicted

 -  positive methacholine challenge (i.e. methacholine PC20 < or = 16mg/ml

 -  positive allergen challenge

 Exclusion Criteria:

 -  negative skin prick test

 -  lung condition/disease other than asthma

 -  currently use montelukast and/or desloratadine