Volume 71, Issue 6
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Sera collected at various time intervals from healthy Thai male subjects after the administration of the three oral formulations of dihydroartemisinin (Cotecxin manufactured in the People’s Republic of China, a formulation manufactured by Arenco n.v. Pharmaceutica in Belgium, and a formulation manufactured by the Faculty of Pharmacy of Mahidol University in Thailand) were investigated for their blood schizontocidal activities against the K1 strain of . Blood schizontocidal activities of sera were evaluated using the maximum inhibitory dilution as a parameter. Sera obtained following the administration of the three formulations of dihydroartemisinin showed significantly distinct degree of antimalarial activities. The differences may reflect the bioinequivalence between these three formulations of dihydroartemisinin. The blood schizontocidal activity profiles generally coincided with plasma concentration-time profiles. Thus, the model might be the useful tool for evaluating and comparing the bioequivalence of the interesting drugs especially where high-performance liquid chromatography with reductive electrochemical detection for drug analysis is not available. The effect of inoculum size of was shown in the model as presented in the sensitivity test. To determine the effect of the inoculum size on the drug activity, the model might be superior to the model since the pharmacokinetic profiles can be considered.


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  • Received : 15 Jan 2004
  • Accepted : 22 Jun 2004

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