PRODUCT LITERATURE
Allergic rhinitis and asthma: How important is the link?
Dysfunction of the upper and lower airways frequently coexist, and they appear to share key elements of
pathogenesis. Data from epidemiologic studies indicate that nasal symptoms are experienced by as many
as 78% of patients with asthma and that asthma is experienced by as many as 38% of patients with
allergic rhinitis. Studies also have identified a temporal relation between the onset of rhinitis and asthma,
with rhinitis frequently preceding the development of asthma. Patients with allergic rhinitis and no clinical
evidence of asthma commonly exhibit nonspeeific bronchial hyperresponsiveness.
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