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  • Title: Double-blind comparison of levocabastine nasal spray with sodium cromoglycate nasal spray in the treatment of seasonal allergic rhinitis.
    Author: Palma-Carlos AG, Chieira C, Conde TA, Cordeiro JA.
    Journal: Ann Allergy; 1991 Oct; 67(4):394-8. PubMed ID: 1683189.
    Abstract:
    Nasal levocabastine (0.5 mg/mL) was evaluated for efficacy and tolerance against sodium cromoglycate (20 mg/mL) in a 2-week double-blind trial in 27 and 29 patients with seasonal allergic rhinitis. Globally at 2 weeks, the investigators found a 74% response rate in the levocabastine patients versus a 50% response rate in the cromoglycate patients (P less than .10). Sneezing responded better to levocabastine than to cromoglycate according to three efficacy indicators derived from patient diary ratings of symptom severity: sum of severity scores over the total treatment period as a percentage of the theoretical maximum sum of severity scores (median: 19% versus 41%, P = .01); percentage of symptom-free days (median: 46% versus 22%, P less than .07); percentage of days with moderate or severe symptoms (median: 0% versus 29%, P = .004). Further, the percentage of days with moderate or severe runny nose was lower than in cromoglycate patients (median: 0% versus 25%, P = .09). Although no significant differences were found for itchy nose, blocked nose, and ocular symptoms, severities tended to be generally less under levocabastine than under sodium cromoglycate. Adverse experiences were low level and of similar incidence in the two groups. It is concluded that in a q.i.d. schedule, levocabastine nasal spray is more efficacious than sodium cromoglycate in relieving sneezing and that it is equally well tolerated.
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