Study to Compare the Efficacy and Safety Between Levocetirizine and Loratadine for Chronic Idiopathic Urticaria

Inclusion Criteria: * Male or female, 18 to 60 years old (inclusive * having chronic idiopathic urticaria * at least 6-weeks history of CIU, had at least 3 days of wheals presence/week * moderate to severe CIU defined as pruritus score ≥ 2, number of wheals ≥ 2, and total symptoms CIU score ≥ 2 at randomization Exclusion Criteria: * Asthma requiring daily drug therapy other than ß2 inhaled agonists taken prn * atopic dermatitis or urticaria requiring an antihistamine treatment or the administration of oral or dermal topical corticosteroids * urticaria caused by physical factors or other known factors * cholinergic urticaria * had urticaria due to other systemic disorders * were on antihistamine drug currently