This product is a derivative of artemisinin. It has a strong and rapid killing effect on the erythrocytic stage of Plasmodium, and can quickly control the clinical attack and symptoms. The mechanism of action of artemisinin is not very clear, which mainly interferes with the function of Plasmodium Plasmodium surface membrane mitochondria. Artemisinin changed the membrane structure of Plasmodium by affecting the ultrastructure of erythrocytic phase. Because of its action on food vesicles, it blocks the nutrient intake of Plasmodium. When the Plasmodium loses a lot of cytoplasm and nutrients, but can not be supplemented, it dies quickly. The mechanism of its action is that the free iron produced by the decomposition of hemoglobin through its internal peroxide (dioxygen) bridge produces unstable organic free radicals and / or other electrophilic mediators, and then forms a covalent adduct with the protein of Plasmodium, which causes the death of Plasmodium