THE PRESENT INVENTION RELATES TO THE USE OF FERROQUINE OR ITS N-DEMETHYLATED METABOLITE OR ANY OF THE PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF FOR TREATING AND/OR PREVENTING INFECTIONS CAUSED BY THE PARASITE PLASMODIUM VIVAX AND, MORE GENERALLY, A PARASITE OF THE GENUS PLASMODIUM, THE LIFE CYCLE OF WHICH INCLUDES A PHASE OF HEPATIC LATENCY IN THE HUMAN HOST.