cycloguanil pamoate was intramuscularly injected into semi-immune people living in the hyper-endemic malarias area. the results showed that a single dose of cycloguanil pamoate by intramuscular injection together with an oral dose of chloroquine, 10 mg/kg body weight, suppressed p. falciparum for at least 3 months and p. vivax for 5 months in bandar abbas, southern iran.