期刊
SCANDINAVIAN JOURNAL OF INFECTIOUS DISEASES
卷 35, 期 1, 页码 52-58出版社
TAYLOR & FRANCIS AS
DOI: 10.1080/0036554021000026981
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A randomized, double-blind, placebo-controlled, parallel-group trial performed at 5 residential units of the Finnish Defence Forces was conducted to assess the antiviral activity, efficacy and safety of inhaled zanamivir for the treatment of naturally acquired influenza. Conscripts were recruited within 2 d of onset of typical influenza symptoms and received inhaled zanamivir 10 mg via a Diskhaler(TM) twice daily for 5 d or matching placebo. Time to alleviation of clinically significant symptoms of influenza was the primary endpoint. Viral load measurements were made using quantitative real-time polymerase chain reaction assays. 435/588 patients (74%) had laboratory-confirmed influenza infection. The mean area under the curve for viral load during the first 48 h of treatment was 8.48 [95% confidence interval (95% CI) 2.85 to 14.11] log(10) vRNA copies/ml x n lower in the zanamivir group compared with placebo (p = 0.003). Zanamivir reduced the time to alleviation of symptoms versus placebo in the influenza-positive group (medians 2.0 vs 2.33 d; 95%, CI-0.17 to 1.0 d, p = 0.08). Zanamivir rapidly reduced viral load following the start of therapy compared with placebo and was well tolerated.
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