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The aim of this study is to assess the efficacy on nasal congestion and other allergic symptoms and the onset of action of an oral combination of cetirizine and pseudoephedrine in comparison to the single substances under controlled pollen exposure in an Environmental Challenge Chamber (ECC).
Enrollment
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Inclusion criteria
Male and female subjects, aged 18-55 years.
Women will be considered for inclusion if they are:
FEV1 > 80% of predicted at screening.
Absence of any structural nasal abnormalities or nasal polyps on examination, absence of a history of frequent nose bleeding or recent nasal surgery.
Absence of conditions or factors, which would make the subject unlikely to be able to stay in the Fraunhofer ECC for 6 hours.
Non smokers or smokers with a history of less than 10 pack years.
Able and willing to give written informed consent to take part in the study.
Available to complete all study measurements.
History of allergic rhinitis to grass pollen and a positive skin prick test for Dactylis glomerata pollen at or within 12 months prior to the screening visit.
Subject must exhibit a moderate response upon 4000 Dactylis glomerata pollen grains/m3 during 2 hours in the ECC on visit 2.
Subjects with mild stable asthma that is controlled with occasional use of as-needed short-acting beta-agonists and associated with normal lung function may be included.
Exclusion criteria
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Interventional model
Masking
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Data sourced from clinicaltrials.gov
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