Nasal obstruction is the main symptom in patients with perennial allergic rhinitis. Some new antihistamines have been demonstrated to be capable of improving this symptom.
Desloratadine and levocetirizine improve nasal symptoms, airflow, and allergic inflammation in patients with perennial allergic rhinitis: a pilot study.
Allergologia-U.O. ORL, Dipartimento Regionale Testa-Collo, Padiglione Specialità (piano terzo), Ospedale San Martino, Largo R. Benzi 10, 16132, Genoa, Italy. gio.cip@libero.it