Compare the Efficacy of Levocetirizine and Montelukast to Placebo in Reducing Seasonal Allergic Rhinitis (SAR) Symptoms in Ragweed Sensitive Subjects
Compare the Efficacy of Levocetirizine and Montelukast to Placebo in Reducing Seasonal Allergic Rhinitis (SAR) Symptoms in Ragweed Sensitive Subjects
To compare the clinical efficacy of levocetirizine 5 mg and montelukast 10 mg on symptoms of
 seasonal allergic rhinitis occurring in subjects exposed to ragweed pollen in an
 environmental exposure unit.
Inclusion Criteria:

 -  Have had seasonal allergic rhinitis due to Ragweed for the last 2 consecutive years

 -  Subjects who obtain a minimum sum score, considering Seasonal Allergic Rhinitis (SAR)
 related symptoms (mean value), as defined by the protocol

 Exclusion Criteria:

 -  Any clinically significant condition that might interfere with the treatment
 evaluation, both for efficacy and safety

 -  Have used forbidden concomitant medications as defined by the protocol