The disposition of oral amodiaquine in Papua New Guinean children with falciparum malaria.

AIMS: We assessed the disposition of oral amodiaquine (AQ) and CYP2C8 polymorphism in 20 children with falciparum malaria. METHODS: AQ and DEAQ concentrations were determined with SPE-HPLC method. CYP2C8 genotypes were assessed by PCR-RFLP method. RESULTS: AQ was not detectable beyond day 3 postdose. Cmax for DEAQ was reached in 3.0 days. The mean values for t1/2, MRT, and AUCtotal were 10.1 days, 15.5 days and 4512.6 microg l(-1) day, respectively. All the children were CYP2C8* homozygous. CONCLUSION: Our data are consistent with those previously reported, and the AQ regimen seems pharmacokinetically adequate in the absence of CYP2C8 polymorphism.