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Tools for more accurate dosage of drugs against HIV/AIDS and malaria
Date:3/6/2009

al patient, and explain why", says Daniel Rshammar.

Further work involved using a model to describe how the catabolism of the anti-malarial drug artemisinin increases and the concentration of the drug decreases when patients take this drug. When artemisinin was given to 97 patients in Vietnam without other drugs, approximately 37% of them were affected by recrudescent malaria. The model showed that this could not be explained solely by low drug concentrations. Another anti-malarial drug, piperaquine, may be a suitable partner for artemisinin in the treatment of malaria. An investigation of 12 Vietnamese study subjects, however, allowed scientists to estimate that the levels of piperaquine that remain in the body are too low to be effective, and this increases the risk that the malaria parasite will develop resistance.

"Research shows that pharmacometric models can be adapted to patient data in order to understand the relationships between drug concentration, effectiveness and the progress of disease, while at the same time taking into consideration differences between patients such as, for example, weight, age, sex, genetic factors, other diseases and other drugs. We expect that these tools will be important in the fight against HIV/AIDS and malaria", says Daniel Rshammar.


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Contact: Ulrika Lundin
ulrika.lundin@sahlgrenska.gu.se
46-707-758-851
University of Gothenburg
Source:Eurekalert

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