Schedule of malarial treatment and iron supplementation, including administration of stable iron isotopes. A course of iron supplementation was initiated in anemic Gambian children. Supplementation was initiated on day 1. Children who had presented with P falciparum parasitemia 3 days previously had their parasitemias cleared by a 3-day course of chloroquine/fansidar. The stable iron isotopes ⁵⁷Fe and ⁵⁸Fe were administered as sulfate on days 1 and 15, respectively. Iron, 2 mg/kg/d, was given as liquid iron glycine sulfate on all other days of the supplementation course starting from day 2.