Chloroquine phosphate, also known as N',N'-diethyl-N4-(7-chloro-4-quinolinyl)-1,4-pentanediamine diphosphate, is used for the treatment of chloroquine-sensitive falciparum malaria, Malaria such as vivax malaria. It can also be used for the treatment of extraintestinal amebiasis, as well as anti-rheumatic effects. Limited to malaria such as falciparum malaria and vivax malaria that are sensitive to this drug (the drug-resistant strains appear widely at home and abroad), it is also used for the treatment of parenteral amoebiasis, and has anti-rheumatic effects.