The purpose of this trial is to evaluate the efficacy and safety of an investigational drug in adult patients with allergic rhinitis.

Inclusion Criteria:

• Japanese males and females with a 2-year documented history of seasonal allergic rhinitis symptoms and positive allergy testing (cedar, alder and/or cypress)

Exclusion Criteria:

• Patients with drug-induced rhinitis or non-allergic rhinitis, or patients who used anti-histamine drugs (within 2 weeks) before the start of the observation period