Publication: Pharmacokinetics of oral artesunate in Thai patients with uncomplicated falciparum malaria
Issued Date
1998-02-25
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ISSN
11732563
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2-s2.0-0031906071
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Mahidol University
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SCOPUS
Bibliographic Citation
Clinical Drug Investigation. Vol.15, No.1 (1998), 37-43
Suggested Citation
Juntra Karbwang, Kesara Na-Bangchang, Kanungnit Congpoung, Aurathai Thanavibul, Tranakchit Harinasuta Pharmacokinetics of oral artesunate in Thai patients with uncomplicated falciparum malaria. Clinical Drug Investigation. Vol.15, No.1 (1998), 37-43. doi:10.2165/00044011-199815010-00005 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/18572
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Title
Pharmacokinetics of oral artesunate in Thai patients with uncomplicated falciparum malaria
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Abstract
The pharmacokinetics of artesunate and its major plasma metabolite, dihydroartemisinin, were investigated in 11 Thai male patients with acute uncomplicated falciparum malaria during the acute and recovery phases. Patients were given an oral dose of 200 mg artesunate (Guilin Pharmaceutical) on the first day, followed by 100 mg 12 hours later, then 100 mg daily for another 4 days (total dose of 700 mg). All the patients showed a rapid initial response with median (range) parasite and fever clearance times of 30 (18 to 60) and 24 (4 to 94) hours, respectively; no patients showed reappearance of parasites during the 28-day follow-up period. No significant clinical adverse effects were detected in any patient. Acute phase malaria infection significantly influenced the pharmacokinetics of artesunate and its active metabolite, dihydroartemisinin. Maximum plasma drug concentration (C(max)), absorption half-life (t@?), area under the plasma concentration-time curve from zero to the last observed time (AUC) and terminal elimination half-life (t@?) of artesunate were decreased, while apparent total body clearance (CL/f) was increased during the acute phase, compared with the recovery phase. In addition, a decrease in the C(max) and an increase in the AUC(DHA/ARS) ratio were found. Optimisation of therapy with oral artesunate should therefore be based on the kinetics of the drug and dihydroartemisinin in malaria patients with acute phase infection.