Evaluate the relative efficacy of four dosing regimens of bilastine tablets (given either once or twice per day) versus placebo in patients with Seasonal Allergic Rhinitis (SAR) in the Mountain Cedar season in south Texas and Oklahoma based on the mean change from baseline in Reflective Total Nasal Symptom Scores (TNSS) assessed over 14 days of treatment.

Inclusion Criteria:

• clinical history of Seasonal Allergic Rhinoconjunctivitis with seasonal onset and offset of nasal allergy symptoms
• documentation of a positive skin test within one year of screening to Mountain Cedar allergen

Exclusion Criteria:

• significant medical condition
• significant nasal abnormality
• significant cardiac condition
• recent infection
• use of other allergy medication during the study