Compare the Efficacy of Levocetirizine to Montelukast in Reducing Symptoms of SAR in Sensitive Subjects Exposed to Ragweed Pollen
Compare the Efficacy of Levocetirizine to Montelukast in Reducing Symptoms of SAR in Sensitive Subjects Exposed to Ragweed Pollen
To compare the clinical efficacy of levocetirizine 5 mg and montelukast 10 mg, administered
 once daily during two consecutive days, 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 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