الفهرس 
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Abstract
This study was performed with the purpose of testing the protective
effect of topical corticosteroids before nasal challenge test in cases of
allergic rhinitis.
In addition, the study aimed at comparing the protective effect of these
drugs against symptoms of allergic rhinitis e.g. sneezing, rhinorrhoae,
itching when these drugs are used for 3 h. and for 2 weeks before nasal
challenge test. The study included 20 patients with allergic rhinitis. Those
patients were divided into two groups; the first group used the topical
steroids for 2 W. before nasal challenge test while the second group used
the same drugs only for 3 h. before nasal challenge test. The results of our
study showed that the protective effect of topical steroids is nearly the
same in both groups.
Clinically, the symptoms of allergic rhinitis were not provocated in both
groups when nasal challenge test was done following the use of topical
steroids
At the same time, IgE assay showed that the level of this antibody was
lowered nearly to the same value in both groups when measured after
nasal challenge test following the use of topical steroids.
from these results Fe can conclude tbat it is sufficient for the
patients with allergic rhinitis to use the topical steroids only for 3 h. to
protect themselves if they are expected to or accidentally exposed to their
specific antigens. This is of course is considered to be simple and an
economic way for the use of these drugs.
It can also be concluded tbat the level of IgE in nasal secretions is
considered to be an accurate measure to the degree of allergy and also is
useful in the follow up after treatment of these cases.