Subdoses of primaquine in overweight patients and malaria vivax relapses: report of two cases in the Federal District, Brazil.

Two cases of malaria by Plasmodium vivax relapsed after treatment with drugs in doses recommended by the Ministry of Health are presented. Both patients were overweight and were followed in the Federal District, an area considered free from vector transmission of the disease. Radical cure was obtained after medication with the same drugs in weight proportional doses.