To Evaluate the Efficacy and Safety of Levocetirizine Versus Loratadine for Treatment of Seasonal Allergic Rhinitis

Study Evaluating the Efficacy and Safety of 5 mg Levocetirizine Oral Tablets, Once Daily Versus 10 mg Loratadine Oral Tablets, Once Daily for the Treatment of Seasonal Allergic Rhinitis (SAR)

To Evaluate the Efficacy and Safety of Levocetirizine Versus Loratadine for Treatment of Seasonal Allergic Rhinitis

Inclusion Criteria:

• Male or female, 18 to 60 years old, inclusive
• two-year history of allergic rhinitis due to tree, grass or weed pollen
• sufficient histamine-dependent symptoms of rhinitis during the selection week (T5SS ≥ 5)

Exclusion Criteria:

• An ear, nose or throat (ENT) infection
• asthma requiring daily drug therapy other than ß2 inhaled agonists taken prn
• atopic dermatitis or urticaria requiring an antihistamine or corticosteroid treatment
• an associated ENT disease
• use of decongestants
• nasal or ocular topical treatment