Clinical Research Directory

Inclusion Criteria: * Ability to confirm voluntary participation and agree for all the purposes of the test, signing and dating the Term of Free and Informed Assent (TALE), signed by the Free and Informed Consent Form (TCLE) by responsible; * Age ≥ 6 years and ≤ 11 years on the day of signing the TALE and the TCLE by the person responsible; * Diagnosis of moderate to severe persistent allergic rhinitis (PAR) according to the criteria of Allergic Rhinitis and its Impact on Asthma (ARIA); * Presence of sensitization to aeroallergens confirmed by positive result to the immediate reading skin test (PRICK test) and/or the presence of specific IgE to the test radioallergoabsorbent (RAST); * Symptom intensity score "nasal obstruction" ≥ 2 points. * Total nasal symptoms score (TNSS) ≥ 8 points. Exclusion Criteria: * Use of prednisolone or other oral or parenteral corticosteroid in the seven (07) days prior to inclusion; * Use of H1 antihistamine, anti-leukotriene and decongestant topic in the seven (07) days prior to inclusion; * Use or indication for the use of antibiotics at the screening visit and randomization; * Presence of adenoid hypertrophy or anatomical disorders known obstructive disorders (e.g. septal deviation) that may be held responsible for nasal obstruction, at the discretion of the investigator; * Diagnosis of severe or uncontrolled asthma; * Allergy to desloratadine, prednisolone or any other component of the formulation of investigational products (PSIs); * Presence of systemic fungal infection; * Presence of any uncontrolled infection; * Presence of any clinical observation finding (evaluation clinical/physical) or laboratory condition that is interpreted by the investigator physician as a risk to participation in the trial clinical or presence of serious uncontrolled disease(s); * Participants who are pregnant or breastfeeding; * Participation in clinical trial protocols in the last 12 (twelve) months (CNS Resolution 251, of August 7, 1997, item III, subitem J), unless the investigator believes that there may be direct benefit to the participant.