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Zanamivir delivers favourable safety profile in children with influenza

16 Nov 2017

The paediatric dosing of intravenous (IV) zanamivir has a safety profile that is consistent with that expected in a population of children hospitalized for severe or progressive influenza, with majority achieving clinical improvement during the treatment course, according to a study.

A total of 71 children with influenza received age-adjusted, weight-based dose of IV zanamivir, which was calculated to provide an exposure comparable to 600 mg twice daily in adults.

The main endpoint investigated was safety, including treatment-emergent adverse events (TEAEs), clinical laboratory measurements and vital signs. Secondary endpoints included clinical outcomes, pharmacokinetics and virologic efficacy.

Of the children, 51 (72 percent) had TEAEs and 15 (21 percent) had serious TEAEs (STEAEs). Mortality rate was 7 percent, and median duration of hospital and ICU stays was 6 and 7.5 days, respectively. No STEAEs or deaths were attributed to IV zanamivir treatment. Moreover, no clinically significant patterns were seen for TEAEs, laboratory abnormalities or vital signs.

The mean zanamivir exposures ranged between 64.5 and 110 hour·µg/mL in the group of 34 children with normal renal function who received 12 mg/kg, 14 mg/kg or 600 mg of IV zanamivir. Following 2 days of treatment, the median change from baseline in the viral load was −1.81 log10 copies/mL.

Safety and efficacy results in the present cohort were similar to those previously described for adults. However, compared with adults, children had fewer grade 3 or 4 TEAEs (32 vs 44 percent) and STEAEs (21 vs 34 percent), as well as a lower incidence of mortality (7 vs 20 percent). [J Infect Dis 2014;209:542–550]

Taken together, the data are consistent with previous observations that children hospitalized with influenza had better recovery than adults, as well as support the paediatric IV zanamivir dosing schedule that was adjusted for weight, age and creatinine clearance, researchers said. [Clin Infect Dis 2007;45:1568–1575]

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Most Read Articles
Pearl Toh, 10 Oct 2019
Adding a LAMA* to the double combination therapy of ICS** plus LABA*** in a single inhaler improves lung function and reduces exacerbations in patients whose asthma is inadequately controlled with the combination treatment, according to the TRIMARAN and TRIGGER# studies presented at ERS 2019.
2 days ago
Environmental quality and exposure to pollution may play a small part in the development of metabolic diseases, such as diabetes, a new study has found.
Tristan Manalac, 4 days ago
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