After having finished the treatment the children will be followed on day 7 and then once a week until day 42. At each visit the condition of the child will be examined and a bloodsample taken for examination of parasites in the blood. Furthermore, a filterpaper bloodsample will be collected for measurement of the drug concentration of if the child has recrudescence for genotyping of the parasites. On day 0, 3 and 42 the haemoglobin level will be examined.