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Although antihistamine-decongestant combinations are frequently used for allergic rhinitis, published data about the onset of action of these combination agents are limited. This randomized, double-blind, placebo-controlled, parallel-group study investigated the onset of action, efficacy, and safety of fexofenadine HCl 60 mg/pseudoephedrine HCl 120 mg or placebo in patients with moderate-to-severe seasonal allergic rhinitis in an allergen exposure unit. Assessments included major symptom complex (MSC) score (sum of sneezing, itchy nose, runny nose, watery eyes, itchy eyes, itchy ears/throat, and stuffy nose), and total symptom complex (TSC) score (MSC symptoms plus nose blows, sniffles, post-nasal drip, and cough). Onset of action was defined as the first time that two consecutive, statistically significant absolute changes in MSC scores from baseline were achieved for study drug relative to placebo. The onset of action for the combination was 60 minutes (mean absolute MSC change from baseline: –6.9 ± 0.3 for the combination compared with –5.9 ± 0.3 for placebo from a baseline of 17.0 and 16.8, respectively; p < 0.05) for the modified intention-to-treat population (n = 48). Reductions in absolute MSC scores were significantly greater with the combination than placebo at all subsequent time points (p < 0.01). The combination resulted in significantly greater reductions compared with placebo for percent MSC, absolute TSC, and percent TSC scores at 60 minutes postdose (all p < 0.05) and throughout the study (all p < 0.05). The incidence of adverse events was 1.6 and 3.3% for the combination and placebo, respectively. In conclusion, fexofenadine HCl 60 mg/pseudoephedrine HCl 120 mg is effective in the treatment of patients with moderate-to-severe seasonal AR, with an onset of action of 60 minutes and a good safety profile.
Document Type: Research Article
Publication date: September 1, 2004
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Allergy and Asthma Proceedings is a peer reviewed publication dedicated to distributing timely scientific research regarding advancements in the knowledge and practice of allergy, asthma and immunology. Its primary readership consists of allergists and pulmonologists.
The goal of the Proceedings is to publish articles with a predominantly clinical focus which directly impact quality of care for patients with allergic disease and asthma.
Featured topics include asthma, rhinitis, sinusitis, food allergies, allergic skin diseases, diagnostic techniques, allergens, and treatment modalities. Published material includes peer-reviewed original research, clinical trials and review articles.
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