Evaluation of Efficacy and Safety of Levocetirizine to Subjects With Perennial Allergic Rhinitis to House Dust Mites

Evaluation of Efficacy, Using the Number of Comfortable Days and the Safety of Levocetirizine Dihydrochloride, Administered Once Daily in the Evening for 30 Days, to Subjects Suffering From Perennial Allergic Rhinitis to House Dust Mites

Evaluation of Efficacy and Safety of Levocetirizine to Subjects With Perennial Allergic Rhinitis to House Dust Mites

Inclusion Criteria:

• male or female ≥ 12 years
• suffering from a perennial allergic rhinitis to house dust mites for at least 2 years
• positive skin test or positive Radio-Allergo-Sorbent-Test for house dust mites
• the mean of the T4SS evaluated in the evening over the last 24 hours of the selection period was ≥ 5

Exclusion Criteria:

• seasonal allergic rhinitis likely to change significantly the symptoms of the subject
• an ear, nose or throat (ENT) infection during the two weeks preceding initial visit
• asthma requiring corticosteroid treatment
• atopic dermatitis or urticaria requiring an antihistamine treatment or the administration of oral or topical corticosteroids
• associated ENT disease