7.4.4 Electrocardiograms (ECGs)
All subjects in the Shionogi adult trials of IV peramivir in acute uncomplicated influenza
(Studies 0722T0622 and 0815T0631) had 12-lead ECGs performed at Screening, Day
1 (post-dose immediately after completion of infusion), Day 3, and at the completion of
study or discontinuation. ECG results were interpreted by a central facility. A total of 29
subjects (2%) had TEAEs of ‘electrocardiogram QT prolonged’ reported; the incidence
of these events was comparable across treatment groups: PRV 300 mg 7 (1%), PRV
600 mg 9 (1%), placebo 3 (1%), oseltamivir 10 (3%). Most of these QTc prolongations
were minor and two-thirds were noted at the Day 6 visit or beyond, arguing against a
causal relationship to study drug. Only two events were considered possibly related to
study drug:
Subject CF1.157-1 - was treated with 300 mg IV peramivir in Study 0722T0621 and had
a 61.5 msec increase in QTcF from baseline on Day 3; the QTc returned to near
baseline value by the end of study. Because the prolongation occurred 2 days after
dosing, it was not possible to rule out a causal relationship.
Subject 122.TAR01 - was treated with 600 mg IV peramivir in Study 0815T0631 had
QTcF prolongation of 62 msec from baseline recorded on Day 9. The investigator
believed this event to be related to the underlying disease, but as a causal relationship
with study drug could not be completely ruled out, this was considered to be an adverse
drug reaction. This patient had no abnormal ECG findings other than QT prolonged and
developed no other adverse events. Considering that this event first occurred on Day 9,
the influence of peramivir was thought to be negligible.
In the BioCryst trials of IM peramivir, ECGs were performed at the Screening/Baseline
visit only, thus no TEAEs related to ECG findings could be reported.