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  • Title: Comparison of efficacy and safety of cetirizine and ebastine in patients with perennial allergic rhinitis.
    Author: Murris-Espin M, Melac M, Charpentier JC, Didier A.
    Journal: Ann Allergy Asthma Immunol; 1998 May; 80(5):399-403. PubMed ID: 9609610.
    Abstract:
    BACKGROUND: Cetirizine and ebastine are two second-generation histamine H1 antagonists undergoing evaluation for treatment of perennial rhinitis. OBJECTIVE: The clinical efficacy and safety of once daily cetirizine 10 mg were compared with ebastine 10 mg in patients with perennial allergic rhinitis in a 4-week, double-blind, parallel-group, randomized, multicenter study. METHOD: Two hundred fourteen patients (120 females, 94 males, aged 17 to 70 years, mean 31.2 years) were selected on the basis of perennial allergic rhinitis history, positive skin test for perennial allergens and a minimum rhinitis symptom score of 6/12. Patients recorded nasal symptom severity (nasal stuffiness, nasal discharge, sneezing, and itching) once daily on diary cards using a rating scale of 0 (none) to 3 (severe). Clinicians made an overall evaluation after 4 weeks of treatment. An intent-to-treat-analysis was performed comparing cetirizine (106 patients) and ebastine groups (108 patients). RESULTS: The individual and total baseline symptom scores were comparable in both treatment groups. During the first week, the percentage mean decrease in the total nasal symptom score from baseline (sum of nasal stuffiness, discharge, sneezing, and itching) was significantly higher for cetirizine 46.2% than for ebastine 32.8% (P = .037). After 4 weeks of treatment, total symptom score improvement was 53.7% for cetirizine and 44.7% for ebastine (P = .12), and the clinician's overall evaluation showed that the percentage of symptom-free patients was significantly higher for cetirizine 17.8% than for ebastine 6.9% (P = .02). Cetirizine also significantly improved nasal stuffiness. An associated antiinflammatory effect is suggested. Commonly reported drug-related side effects were similar in both groups. CONCLUSION: This study shows that both antihistamines, cetirizine 10 mg and ebastine 10 mg once a day, improved symptom scores of patients with perennial allergic rhinitis. Cetirizine, however, provided faster improvement and total relief in a greater number of patients after 4 weeks.
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