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lüll Treatment of nonallergic perennial rhinitis Ciprandi GAllergy 2004[]; 59 Suppl 76 (ä): 16-22; discussion 22-3Nonallergic perennial rhinitis (also commonly referred to as vasomotor rhinitis) is a chronic non-IgE-mediated condition that is characterized by symptoms which are similar to those seen in allergic rhinitis, but which persist for over nine months each year. Although treatment of vasomotor rhinitis involves the use of either intranasal corticosteroids or antihistamines, the corticosteroids are generally not effective in treatment of all the symptoms of vasomotor rhinitis and have generally been shown to be effective in patients with eosinophilia. With the exception of azelastine, the only topical antihistamine to be approved by the FDA for the treatment of nonallergic rhinitis, the antihistamines have also produced inconsistent results. While clinical studies of azelastine have demonstrated that this drug is highly efficacious in the treatment of all the symptoms of vasomotor rhinitis, mechanistic studies have demonstrated that azelastine has potent anti-inflammatory effects (in particular attenuation of the expression and synthesis of pro-inflammatory cytokines, leukotrienes, and cell adhesion molecules), which are likely to contribute to its clinical efficacy. Furthermore, pharamacokinetic studies have suggested that since azelastine has a more rapid onset of action, compared to most other antihistamines and intranasal corticosteroids, then azelastine nasal spray may be considered as primary therapy for patients with symptoms of both allergic and/or vasomotor (nonallergic perennial) rhinitis.|Anti-Allergic Agents/*therapeutic use[MESH]|Dose-Response Relationship, Drug[MESH]|Drug Administration Schedule[MESH]|Drug Therapy, Combination[MESH]|Female[MESH]|Follow-Up Studies[MESH]|Histamine H1 Antagonists/*therapeutic use[MESH]|Humans[MESH]|Male[MESH]|Phthalazines/therapeutic use[MESH]|Rhinitis, Vasomotor/*diagnosis/*drug therapy[MESH]|Risk Assessment[MESH]|Severity of Illness Index[MESH]|Treatment Outcome[MESH] |