Comparison of Desloratadine Associated With Prednisolone Oral Solution Versus Dexchlorpheniramine Associated With Betamethasone for Persistent Allergic Rhinitis Treatment

Inclusion Criteria: * Consent of the patient or legal guardian; * Clinical diagnosis of moderate - severe persistent allergic rhinitis according to the classification of ARIA (Allergic Rhinitis and Its Impact on Asthma); * Children aged between 2 and 11 years and 11 months (up to 30 kg); * Presence of nasal symptoms score greater than or equal to 5 (scale 0 to 12)in the last week; * Evidence of sensitization to aeroallergens in examination (immediate skin tests or serum specific IgE) in the 12 months prior to inclusion. Exclusion Criteria: * Participation in clinical trial in 30 days prior to study entry; * Patients receiving immunotherapy; * Patients with history of hypersensitivity to desloratadine or prednisolone or with corticosteroids use contraindications ; * Patients with any clinically significant disease other than allergic rhinitis, including hematopoietic, cardiovascular, renal, neurological, psychiatric or autoimmune disorders; * Patients on treatment with monoamine oxidase inhibitors (MAOIs); * Patients who were in use of oral antihistamines or decongestants in the past 15 days; * Patients who were treated with systemic corticosteroids in the last month; * Patients who have uncontrolled asthma, chronic sinusitis, drug related rhinitis and nasal anatomic abnormalities.