Artemether-lumefantrine is a new fixed antimalarial combination effective a
gainst multidrug-resistant falciparum malaria. A prospective electrocardiog
raphic study was conducted in 150 patients receiving artemether-lumefantrin
e and 50 treated with artesunate-mefloquine. There was no evidence for clin
ically significant changes in the electrocardiographic intervals and in par
ticular no relationship between plasma concentrations of lumefantrine and Q
Tc prolongation. Artemether-lumefantrine does not have significant cardiac
effects at therapeutic doses.